JH-ANC918 User Manual

A. Product Labeling

The following describes the labeled parts of the JH-ANC918 headphones:

• 1. "+" key: Used for volume up and to skip to the next song.
• 2. [power] button: Powers the device on or off.
• 3. "-" key: Used for volume down and to go to the previous song.
• 4. Indicator light: Displays Bluetooth connection status, charging status, and ANC status.
• 5. 3.5mm AUX audio jack: For wired audio connection.
• 6. Charging port: For charging the device.
• 7. Microphone: For calls and voice commands.
• 8. ANC switch: Activates or deactivates Active Noise Cancellation.

B. Function Introduction

1. ANC on/off

• ANC on: When the ANC is off, turn the ANC switch on. The ANC indicator light will illuminate.
• ANC off: When the ANC is on, turn the ANC switch off. The ANC indicator light will turn off.

2. Power on/off

• Turn on: From a power-off state, long-press the power button. The blue and red lights will flash alternately.
• Turn off: From a power-on state, long-press the power button. The indicator light will turn off.

3. Match cell phones or other Bluetooth devices

• In power-off mode, press and hold the power button for 3 seconds until the red and blue lights flash alternately. The headphone will enter pairing mode.
• Turn on the Bluetooth switch on your phone or other Bluetooth device.
• Search for the Bluetooth pairing name "JH-ANC918" and click "connect".
• Upon successful pairing, the Bluetooth connection status indicator will flash blue slowly, and a pairing tone will be heard.
• The headphone memorizes the current device and will automatically pair on subsequent connections.

4. Music player

• Press the power button to play or pause music.
• Press the "+" key to increase the volume.
• Press and hold the "+" key to skip to the next song.
• Press the "-" key to decrease the volume.
• Press and hold the "-" key to switch to the previous song.

5. Call

• Answer call: Short-press the power button when a call is incoming.
• End call: Short-press the power button to end the current call.
• Reject call: Long-press the power button to reject an incoming call.
• Redial last number: Double-tap the power button to call back the last number dialed on the phone.

6. Charge

• When the headphone indicates a low battery, turn it off and charge it.
• Connect a USB charging port or a 5V power adapter.
• Connect the headphone charging jack.
• While charging: The charging indicator light is red.
• Charging completed: The charging light turns off.

7. Wired function

• No ANC: In power-off mode, connect one end of the AUX cable to the headphone's audio jack and the other end to the audio output port of your phone or other device.
• ANC: Turn on the ANC switch. Connect one end of the AUX cable to the headphone's audio jack and the other end to the audio output port of your phone or other device.
• In wired mode, music playback is controlled by the connected device.

C. Headphone Parameters

D. ANC Function Description

The Active Noise Cancellation (ANC) circuit uses a built-in microphone to sense external noise and generates equal and opposite cancellation signals.

• The ANC effect might be less noticeable in very quiet environments, or you may perceive minor noise.
• The ANC effectiveness can vary based on how the unit is worn. Buzzing or squeaking may occur; if so, remove and re-wear the unit.
• The ANC function is primarily effective against low-frequency noise. While noise can be reduced, it cannot be completely eliminated.
• Mobile phones can cause interference and noise. If this occurs, move the unit away from the mobile phone.
• Avoid covering the unit's microphone with your hand, as this may impair ANC function or cause buzzing (squeak).

E. About Bluetooth Communication

• Bluetooth wireless technology operates within approximately 10m, which can be affected by obstacles (e.g., body, metal, walls) and the electromagnetic environment.
• Bluetooth communication may be interrupted, or experience noise or audio loss under the following conditions:
  • When there is an obstruction between the unit and the Bluetooth device.
  • When there are obstacles like metal or walls between the unit and the Bluetooth device.
  • When devices using the 2.4GHz frequency (e.g., Wi-Fi devices, cordless phones, microwaves) are in close proximity.
• Due to the shared 2.4GHz frequency between Bluetooth and Wi-Fi, microwave interference may occur near Wi-Fi devices, leading to noise, audio loss, or communication interruption. To mitigate this:
  • Keep the unit at least 10m away from Wi-Fi devices.
  • If using the unit within 10m of a Wi-Fi device, turn off the Wi-Fi device.
  • Place the unit and the Bluetooth device as close to each other as possible.
• Microwaves emitted from Bluetooth devices may affect electronic medical devices. In sensitive locations like hospitals, gas stations, near automatic doors, or fire alarm bells, turn off this unit and other Bluetooth devices to prevent accidents.
• Always use the supplied earphone cable when using this unit on an airplane.
• Due to wireless technology, there might be a delay between the sound played on the sending device and the sound from this unit, potentially causing desynchronization when watching videos or playing games.
• The manufacturer is not responsible for any information disclosure during Bluetooth communication.
• Connection to all Bluetooth devices cannot be guaranteed.

F. About Charging

• Do not turn on the headphones or use Bluetooth while charging.
• If the headphones are not used for an extended period, the rechargeable battery may not retain sufficient power. Repeated charging and discharging cycles will help maintain optimal battery performance.
• If storing the unit for a long time, charge the battery every six months to prevent over-discharge.

FCC Statement

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.

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 or more of the following measures:

• Reorient 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.

Changes or modifications not expressly approved by the party responsible for compliance could void your authority to operate the equipment.