Promate Bali High Performance Dynamic Neckband Magnetic, 7 Hours Long Playtime: Technical Specifications:Bluetooth Version:  v5.0Bluetooth Profile: HSP, HFP, A2DPCharging Time: 1.5-2 hours Playing Time: 7 hours      Battery Capacity：120mAhBattery Type: Li-PolymerOperating Distance: 10mFeatures:Engineered for Audio Precisio