Bluetooth chip: QCC3003

Speaker type: 1-watt bone conduction speaker

Battery: 140 mAh pure cobalt polymer battery

Microphone: Anti-interference microphone, -38db

Use time: 5 hours (medium standard volume)

Standby time: 20 days

Effective range: 15 meters

Mono/Stereo: Stereo

Bluetooth version: EDR/ (QCC3003) 5.0

Weight: 27g

Bluetooth Class(1/II): II

BQB included(Y/N): No

Bluetooth Profile: a2dp/HFP, HSP, AVRCP, GAVDP, AVDTP

Receiving sensitivity: 84±3dB

Impedance: 10 Ω±15% (AT 800 HZ)

Frequency range: 20—–20KHZ

FM: No

Charging: Use the USB interface for 2 hours

TF card: No

Product size: 132*106*51

System language: English prompt

Red light flashes quickly: low battery warning

Steady red light: charging

Blue light is always on: fully charged

Flashing blue and red alternately: BT pairing

Blue light flashes slowly: mismatch, maybe the device is powered off, or the distance between the two is more than 15M, the blue light flashes slowly: match/dial/play audio

Answer a call: double-click the multi-function button

End a call: double-click the multi-function button

Reject a call: long press the multi-function button for two seconds

Call: none

Switch songs: three-click multi-function button

Enable Siri: Long press the multi-function button for three seconds

Volume control: Click the volume button “+” “-“

1. Press and hold the Power button for 3 seconds in the off state, the red and blue indicator lights will flash alternately to indicate the pairing state.
2. Search for Bluetooth devices or other digital products on the mobile phone, and then select BH528

Note:

1. If the connection distance exceeds the effective distance of the BT headset (15 meters), the headset will be disconnected from the device. Once again within the valid range, they will automatically connect again. But if the disconnection lasts for a long time, you need to connect manually.
2. If it is a connected device, the headset will automatically connect to the paired device after it is turned on. “