TREBLAB U5 Wireless Headphones
User's Manual
HYBRID ACTIVE NOISE CANCELLATION
Thank you for choosing TREBLAB U5! These over-ear headphones with Hybrid Active Noise Cancellation technology provide superior sound quality and the convenience of hands-free operation.
Diagram of TREBLAB U5 Headphones
The headphones feature several controls and ports:
- ANC: Active Noise Cancellation button.
- VOLUME + / NEXT TRACK: Button to increase volume or skip to the next track.
- POWER / PLAY / PAUSE: Button for power control, play/pause, answering/ending calls.
- VOLUME - / PREVIOUS TRACK: Button to decrease volume or go to the previous track.
- ANC MICS: Microphones for Active Noise Cancellation.
- TYPE-C PORT: Port for charging the headphones.
- ANC/CHARGING INDICATOR: LED indicator for ANC status and charging status.
What's in the Box
- TREBLAB U5 headphones
- User's manual and quick start guide
- TREBLAB sticker
- Carrying case
- USB-C to USB-A charging cable
- USB-C to 3.5 mm AUX cable
Getting Started
Turning On and Off
- Power On: Press and hold the POWER button for 2 seconds. You will hear sound prompts, and the ANC button will flash white, indicating pairing mode.
- Power Off: Press and hold the POWER button for 3 seconds. You will hear a sound prompt, and the ANC button light will turn off.
Pairing
- Ensure the TREBLAB U5 headphones are charged and the AUX cable is not plugged in.
- Press the POWER button for 2 seconds to enter pairing mode (ANC button flashes white).
- Activate the wireless communication function on your smart device and keep it within 3 feet / 1 meter of the TREBLAB U5.
- Scan/search for available devices on your smart device.
- Select "TREBLAB U5" from the device list. Enter "0000" if prompted for a password.
- Once successfully paired, you will hear a "beep" sound prompt, and the ANC button will show a steady white light.
Multipoint Connection
The TREBLAB U5 headphones support connecting to two devices simultaneously, allowing seamless switching between them. To connect to a second device:
- Temporarily switch off the wireless mode on the first connected device.
- Repeat pairing steps 2-6 to connect the second device.
- Turn on the wireless communication function on the first device and connect the U5 again.
The headphones will attempt to reconnect to the last connected devices automatically. If not, they will search the pairing list. The headphones can save up to the last 6 connected devices.
Features and Operation
Gaming Mode
TREBLAB U5 supports gaming mode to reduce audio latency to 60 ms, improving video/audio synchronization. To enable, double-press the POWER button (one-tone sound prompt). To disable, double-press the POWER button again (two-tone sound prompt). Note: Gaming mode may reduce connection range; disable if experiencing connection issues.
Audio Playback
- Pause/Resume: Click the POWER button.
- Volume Up: Click the VOLUME + button.
- Volume Down: Click the VOLUME - button.
- Next Track: Press and hold VOLUME + for 1 second.
- Previous Track: Press and hold VOLUME - for 1 second.
AUX Line-in Connection
Connect TREBLAB U5 to devices using the supplied AUX cable. Plug the Type-C end into the right earcup's Type-C port and the 3.5 mm end into your device's AUX port. Remote control for playback functions (NEXT, PREVIOUS, PAUSE, VOLUME) is not supported via AUX; use your smart device for adjustments.
ANC/Ambient Sound Modes
The headphones feature Hybrid Active Noise Cancellation. ANC mode reduces surrounding noise, while Ambient Sound mode amplifies frequencies to help you hear voices. When turned on, ANC mode is enabled automatically. To switch to Ambient Sound mode, press the ANC button once. To disable both modes, press the ANC button again.
Sound prompts for ANC modes: ANC on - "whap"; Ambient Sound - "ring-ring"; ANC off - "dong-dong". Ensure ANC microphone holes remain unblocked.
Phone Calls
TREBLAB U5 can be used for wireless phone calls; audio playback pauses during calls.
- Answer a call: Press the POWER button during an incoming call.
- Reject a call: Press and hold the POWER button for 1 second during an incoming call.
- End a call: Press the POWER button during a conversation.
Voice Assistant Activation
To activate your device's voice assistant, press and hold the ANC button for 1 second. You can then transmit voice commands using the inbuilt microphone.
Reset Memory List
To reset the U5 headphones to factory default settings and clear the pairing list (last 6 devices): Turn the headphones on, ensure they are disconnected from any device. Press and hold both VOLUME + and VOLUME - buttons simultaneously for 3 seconds. The headphones will restart, and the device memory will be reset.
Charging and Battery
A low battery is indicated by a sound prompt resembling a busy tone. To charge, plug the supplied cable into the Type-C charging port on the right earcup and the other end into a standard USB port. The LED indicator will turn RED while charging and BLUE when fully charged. Charging takes up to 4 hours. Use a 5V DC, 0.5-2A adapter for optimal charging. Unplug the headphones and cable when not in use. To maintain battery life, it is recommended to charge the TREBLAB U5 fully at least twice a month.
Troubleshooting
| Problem | Solution |
|---|---|
| Doesn't turn on | Ensure the headphones are charged (up to 4 hours). Press and hold the POWER button for 2 seconds. |
| Music is not playing | Verify music is playing on the source device. Ensure headphones are charged. If using AUX mode, check the AUX cable connection. If using wireless, ensure the AUX cable is removed. Check that volume levels are not set to 0 on both the headphones and the device. Ensure the distance between your device and headphones is less than 30 feet / 10 meters. Confirm your smart device's wireless function is enabled and not engaged in a wired connection. |
| Headphones don't pair with my device | Make sure the AUX cable is not plugged in. Ensure the headphones are not already paired with two other devices. Check that the distance between your device and headphones is less than 30 feet / 10 meters. Confirm your smart device's wireless function is enabled and not engaged in a wired connection. Reset your headphones to factory settings and try pairing again. |
| Headphones are visible on my device, but do not connect | Ensure the headphones are not paired with two other devices. Check that the distance between your device and headphones is less than 30 feet / 10 meters. Reset your headphones to factory settings and try pairing again. |
| I cannot find a wireless driver for on my laptop | Verify your laptop supports wireless connection. If not, an external wireless USB adapter compatible with your laptop may be needed. Consult your laptop manufacturer for details. |
| Frequent disconnection and noise | Ensure the distance between your device and headphones is less than 30 feet / 10 meters. Confirm there are no obstructions blocking the signal. Check if the headphones are running low on power. |
Safety Rules
- Do not disassemble or modify the headphones, as this may cause malfunction, combustibility, or void your warranty.
- Keep the device dry; liquids can cause serious damage and void your warranty.
- Ensure the headphones are completely dry before charging.
- Avoid exposing TREBLAB U5 to extreme temperatures (below 37°F / 3°C or above 112°F / 45°C), which can deform components, reduce battery life, and shorten lifespan.
- Do not point the device's LED lights close to humans' or animals' eyes.
- Do not use the U5 during a thunderstorm, as it can cause serious malfunction and increase the risk of electric shock.
FCC Statements
FCC Compliance Statement - Part 15
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
FCC Interference Statement - Part 15
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
RF Exposure Information
The device has been evaluated to meet general RF exposure requirements. The device can be used in portable exposure conditions without restriction.
Recycling
The headphones can be recycled to help keep the planet clean. For recycling options:
- In the US: https://www.call2recycle.org, https://search.earth911.com, https://recyclenation.com/find, https://www.cta.tech/Consumer-Resources/Greener-Gadgets
- In Canada: https://thinkreuse.net, https://www.call2recycle.ca
- In the UK: https://www.recycle-more.co.uk/, https://www.recyclenow.com/local-recycling
Specifications
- Speaker unit: Ø40 mm, 32Ω
- Charging port: USB Type-C
- Dimensions: 210 x 195 x 78 mm / 8.26 x 7.67 x 3.07 in
- Weight: 265 g / 0.58 lbs / 9.34 oz
Thank You & Warranty
We appreciate you choosing TREBLAB as your trusted brand of wireless ANC headphones. We hope you enjoy the great sound and seamless usability of the TREBLAB U5. For any questions or if you are not completely satisfied with your purchase, please contact TREBLAB at http://treblab.com/contact_us.
1 YEAR FULL WARRANTY (Parts & Labor Warranty)
Please visit www.treblab.com to register YOUR product. Designed by Productech in the U.S.
Made in China
WARNING: This product can expose you to Bisphenol A, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.
