YK S4 Wireless Headphone

• Model : YK-S4
• Type : Wireless Headphone
• Bluetooth Version : Dual-mode BT V5.0+EDR. Ultra-low power consumption
• Function : with volume control+with MIC
• Battery capacity of earphone: 300mAh
• Playing time : 13-15H(100% volume)
• Playing time : 23-25H(50% volume)
• Charging time : 2Hours