Introduction
Thank you for purchasing the SubZero NH300BT Bluetooth Noise Cancelling Headphones. To get the most out of your product, please read this manual carefully.
Box Contents
- 1 x SubZero NH300BT Bluetooth Noise Cancelling Headphones
- 1 x Zipped carry case
- 1 x 3.5mm TRS Jack cable
- 1 x USB charging cable
- 1 x Airplane entertainment system adapter
Features
- Active noise cancelling technology, with comfortable padded design.
- Foldable and travel-friendly, with carry case and airplane adapter.
- Stay connected - make and receive mobile calls wirelessly.
- Wireless Bluetooth listening with 25 hours of battery life.
- Passive mode available to conserve battery life.
Functions
Headphone Controls
The headphones feature the following controls and indicators:
- [1] ANC ON/OFF Button: Turns the Active Noise Cancellation feature on or off.
- [2] Volume Decrease / Previous Song Button: Tap to decrease the volume. Press and hold to select the previous song.
- [3] Multifunction Button (MFB): Used for Bluetooth ON/OFF, answering/ending calls, and play/pause functionality.
- [4] Volume Increase / Next Song Button: Tap to increase the volume. Press and hold to select the next song.
- [5] Microphone (MIC): For voice calls and Active Noise cancellation.
- [6] 3.5mm Jack Input: Connect the supplied 3.5mm Jack cable to use the headphones in a wired configuration with suitable audio devices.
- [7] LED Indicator: Provides status information (charging, Bluetooth connection, ANC status).
- [8] USB C Connection Port: Connect the supplied USB C power cable here for charging.
Detailed Function Descriptions
1. ANC ON/OFF
Hold the ANC button for 1 second to turn the Active Noise Cancellation feature on. The green LED light will turn on. This feature is available in both wired and wireless modes. Hold the ANC button for 1 more second to disable this mode.
2. Volume Decrease / Previous Song
To decrease the volume, tap the volume down key. To select the previous song, press and hold the volume down key.
3. Multifunction Button
- Bluetooth ON/OFF: When Bluetooth is off, press and hold the button until you hear an ascending tone. When Bluetooth is on, ensure no audio is being emitted through the headphones, then press and hold the button until you hear a descending tone.
- Answer/End Call: When a phone call comes in, short press the button to answer it, or long press for 2 seconds to reject the call. To end a call, short press the button again.
- Play/Pause: To play a song, select the track in your paired music player and press the Play/Pause key on the headset. To pause or resume playing a song, press the Play/Pause key again.
4. Volume Increase / Next Song
To increase the volume, tap the volume up key. A beep tone will play when maximum volume is reached. To select the next song during playback, press and hold the volume up key.
5. MIC
The microphone is used for voice calls and Active Noise cancellation.
6. 3.5mm Jack Input
Connect the supplied 3.5mm Jack cable to use the headphones in a wired configuration with suitable audio devices.
7. LED Indicator
- RED: Charging.
- BLUE: Bluetooth is connected.
- GREEN: Active Noise Cancellation is on.
- ALTERNATING BLUE/RED: Bluetooth in pairing mode.
- LED BLUE/GREEN: Bluetooth connected & Active Noise Cancellation is on.
8. USB C Connection
Connect the supplied USB C power cable here. Please ensure a suitable power source is used, such as a computer/laptop or USB mains adapter.
Headband Adjustment
Follow these steps to adjust the headband for a comfortable fit:
- Adjust the headband length manually; there is approximately 2-3cm of extension available.
- Align the headband so it sits centrally on the user's head.
- Readjust the headband so the headphone driver cups sit over the ears and the unit fits comfortably on your head.
Operation
Charging the Battery
The headset contains a micro USB input for connecting to a computer or other charging device. Plug the micro USB end of the included cable into the connector on the left earphone, then plug the other end into your computer or charging device. The indicator light will turn red whilst charging. When fully charged, this light will change to blue. Charge time is around 3 hours from an empty battery.
Active Noise Cancelling
Hold the ANC button for 1 second to turn on the noise cancelling feature (green LED will illuminate). Hold the ANC button for 1 more second to disable this mode.
Bluetooth ON/OFF and Pairing
To turn on Bluetooth mode, hold the MFB button for 3 seconds. This will engage Bluetooth searching mode, indicated by blue and red flashing lights. To turn off this mode, hold the button for a further 3 seconds.
To pair, ensure your phone or other Bluetooth device is switched on. Switch on the headset and activate pairing mode as described above. Activate the Bluetooth feature on your device and select the "SZ-NH300BT" option. When successfully connected, the blue light will remain static.
If the headset has been previously paired with another device, it will automatically connect when switched on. If pairing does not occur within 30 seconds, the Bluetooth pairing mode will deactivate. Press the MFB button again to reactivate pairing mode.
To disconnect the headset from your device, switch off the headset or disconnect in the Bluetooth menu of your device.
Adjusting Volume
Turn the volume up or down using a long press on the volume +/- buttons whilst listening to music or during a call. A warning tone will play when you reach maximum volume.
Application
The SubZero SZ-NH300BT Noise Cancelling Headphones can make and receive calls hands-free with a compatible mobile phone. The device should be within 10 metres of the headphones. This headset is compliant with Bluetooth Specification 4.1, supporting profiles: Headset Profile (HSP) V.16, Hands-free Profile (HFP) V.15, Advanced Audio Distribution Profile (A2DP) V1.0, and Audio Video Remote Control Profile (AVRCP) V1.4. Input Rating: 5V DC, 0.5A.
Calls
To make a call, use your mobile phone in the normal way when the headset is connected via Bluetooth. Quickly press the MFB twice to call the last number in your call list. When receiving a phone call, quickly press MFB to answer or hold for 1.5 seconds to reject the call. To end a call, press the MFB at any time.
Listening to Music
To listen to music, connect the headphones to a phone or compatible music player that supports A2DP Bluetooth. Music functions depend on your Bluetooth device. If you receive or make a call while listening to music, the music will pause until the call ends.
To play a song, select the music player and press the play/pause key. To skip to the next track, quickly press the volume up key. To skip to a previous song, quickly press the volume down button. To increase the volume, press and hold the corresponding key.
Passive Mode
You can use the SZ-NH300BT headphones as wired headphones to save battery life. Simply plug the included cable into the bottom of the left headphone and connect to your MP3 player or computer.
Low Battery
When the battery voltage is low, a warning beep will sound every 60 seconds. When the battery is too low, it will switch off automatically.
Specifications
- Driver: 40mm
- Impedance: 32Ω
- Driver Unit Frequency: 20Hz - 20kHz
- Headset Sensitivity: 97dB+/-3dB
- Microphone Sensitivity: -42dB
- Bluetooth Version: Bluetooth V4.1
- Radio Frequency Coverage: 2.402GHz – 2.480GHz
- Transmit Range: 10 Metre (without obstruction)
- Active Noise Cancelling: Up to 20 - 25db between 100-1000hz
- Status Indication: LED (Blue slow flash under Bluetooth mode)
- Pairing Products: Bluetooth computer (HFP, A2DP, AVRCP Bluetooth protocol), USB Bluetooth adapter, Bluetooth cell phone, etc.
- Battery: Rechargeable Lithium ION Battery, 3.7v 300mAH
- Charge: Computer USB interface, Output DC 5V/300Ma Charger
- Charging Time: 2 hours
- Operating Hours: 25 hours of wireless listening and 100 hours of Standby Time
Important Safety Warnings
Please read the following safety precautions carefully:
- Do not open the cover. No user-serviceable parts inside. Refer servicing to qualified service personnel.
- Do not place the product near a heat source such as a radiator, or in an area subject to direct sunlight, excessive dust, mechanical vibration or shock.
- The product must not be exposed to dripping or splashing, and no objects filled with liquids, such as vases, shall be placed on the product.
- No naked flame sources, such as lighted candles, should be placed on the product.
- Allow adequate air circulation and avoid obstructing vents (if present) to prevent internal heat build-up. Ventilation must not be impeded by covering the appliance with items such as newspapers, table-cloths, curtains, etc.
Contact Information
For any further questions about this product, please do not hesitate to contact the Gear4music Customer Service Team:
Phone: +44 (0) 330 365 4444
Email: info@gear4music.com
Addresses:
- Kettle String Lane, York, YO30 4XF, United Kingdom
- Metallvägen 45A, 195 72 Rosersberg, Stockholm, Sverige
- Lahnstraße 27, 45478 Mülheim an der Ruhr, Deutschland
