Description & Features:

• Mic size: 40mm.
• The transmission distance: 10m.
• The working time: 5-6 hours.
• Standby time:120 hours.
• Charging time: 2h.
• The capacity of battery: 250mAh rechargeable lithium polymer battery.
• The function:Volume control,song switch,calls receive/refuse,handsfree calls.
• Intelligent turn off,the headphone will be turned off after 5 minutes.
• ST-5 Retractable Bluetooth wireless headphone support for iphone 8 iphone 7.
• Subwoofer Heavy bass Sports running headphone.