Bluetooth version : V5.0 Profile : A2DP/AVRCP/HSP/HFP Battery : 180mAh Driver Unit : Ø 40mm (changed unit better one/final sample） Impedance : 32Ω Sensitivity(SPL) : 110± 3dB Frequency response : 20Hz-20 KHz LOGO single color silk print（no fading. Hologram sticker attach on color box,.
