*Model: WB 9 Pro

*Brand: Wisdom

* Bluetooth version: Bluetooth V5.3+EDR

*Control: Touch Control

*Battery: 300Mah

*Charge: Type-C/DC5v

* Distance: 10 meters no jam

*Sound: Super Bass

* Speakers specification: 8*5mm

* Frequency response: 20HZ-20KHz

* The battery voltage:3.7V

* Transmission distance (barrier-free): 10m

* Signal-to-noise ratio: 85dB

* Distortion: 1%

*Charging box capacity:300mAh

* The headset capacity:35mAh

* Charging time: 1-1.5 hours

* Running time: about 48 hours

* Standby time: about 240 hours

* Sensitivity of microphone: -42dB ±3dB

* Support L2CAP/A2DP1. 2 (AVCTP1.3/AVDTP1.2/AVRCP1.4)