L21 private model wireless bluetooth headset $ 8.27 technical parameter- Communication distance: more than 10 meters Talk time: 4 hours Standby time: 120 hours Music time: 4 hours Battery type: lithium polymer battery Support protocol: HEP\HSP\A2D\AVRCP Battery capacity: 55AM (rechargeable polymer battery capacity: 320AM) Horn material: copper ring 8mm Process material: ABS+plating+food silicone ear cap Version: V5.0
