W28 Journey wireless headphones BT V5.0 with 250mAh battery capacity for 10 hours of calls / music 200 hours of standby AUX input1. Speaker: 40mm.2. BT specification: BT V5.0 JL6925.3. Supporting agreements: A2DP, AVRCP, HSP, HFP.4. Charging time: about 2 hours. Standby time: more than 200 hours.5. Calls / music time: about 10 hours (80% volume).6. Size: 185*167*76mm. Weight: 220g.