Promate Hook Dynamic Stereo Wearable Neckband Wireless Speaker with 360-Degree Sound 9H Playtime - Black: Technical Specifications:Bluetooth Version: v5.0 + EDRBluetooth Profiles: HSP / HFP / A2DP /AVRCP/AACChipset: JL-AC6973D4Speaker Output: 2*3WCharging Time:2-3 Hours   Playing Time:8-9 HoursBattery Capacity: 600mAhBattery Type: Li-polymer Features:Dynamic 6W Speaker with Ex