Style:Neckband/In-ear

Specifications：

* Bluetooth Version: V5.3

* Support profiles: HSP,HFP,AVRCP,A2DP

* Frequency range: 2.402 GHz - 2.480GHz

* Audio range: 20Hz-20KHz

* Sound Mode: Real Stereo Bass

* Charging time: About 2.5 hours

* Voice assistant

* Support micro sd card paly

* Battery : Li-ion 400mAh/3.7V （也定制低容量）

* Music time: About 40 hours 

* Talk time: About 40 hours

* Operating Distance: About 20 meters

* Output: 25mW*2

* SNR: ≥95dB

* Speaker Impedance: φ10mm,32Ω Bass

* Microphone: -42dB

* Colors: black,red,gray