Wearable wireless neckband speaker with 360-degree sound and a 9-hour playback time, Promate Hook Dynamic Stereo: Black Technical Details: Version of Bluetooth: 5.0 + EDR Profiles for Bluetooth: HSP, HFP, A2DP, AVRCP, and AACC JL-AC6973D4 hipset 2*3W speaker output Playing Time: 8–9 hours; Charging Time: 2–3 hours 600 mAh is the battery's capacity. Li-polymer battery type; features: Exciting 6W Dynamic Speaker