Bluetooth version: Bluetooth V5.0 Jelly 5.0 Model: AC6966B, Battery capacity: 18650(1200mah)/3.7V + battery protection plate, Supported protocols: A2DP AVRCP, HFP, HSP, Bluetooth operating frequency:2.402GHz-2.480GHz, Maximum transmitting power:8DB, Receiving sensitivity (TYP):-90 dBm, Input charging standard:TYPE-C,DC5V/1A, Charging time: approx. 2.5 hours, Playback time: 6-7 hours (70% volume), Effective distance: less than 10 m (no obstacle blocking facing the device), Maximum power: 5W*2 (10W), Speaker unit:Speaker*2 Size:Φ2.5 inch(resistance 4Ω), Functions:Supports playback of MP3 (TYPE-C SD card 32G-MAX).FM mode (FM frequency 87.5MHZ-108MHZ), wired microphone, LED light, AUX audio function, TWS true, Size: 28* 10.5*14.8 cm Weight: 928.1 ± 20 g