BS35 Classic sound BT V5.0, with 1200mAh battery, for 8 hours of calls and music, support BT, calls, FM, TF card, AUX, TWS playback mode1. Speaker: 45mm * 2. Maximum output power: 3W * 2.2. Sizes: 198x79x78mm. Weight: 495g.3. BT specification: BT V5.0 JL.4. Function: support BT, calls, FM, TF, USB, AUX, TWS mode.5. Charging time is about 2.5 hours. Calls / music time: about 8 hours (80% volume).6. Battery: 1200mAh A-class 18650.