Iqua Sun BHS-603 Bluetooth Wireless Headset Standby time: Up to 200h Bluetooth Standard Bluetooth Specification 2.0 /Class II, Connection Point-to-point Paired devices Up to 8, one at a time Charging time Within 2h, Battery type Li-Polymer battery Supported Bluetooth profiles Handsfree 1.5 and Headset 1.1 Operating Distance 10 meters Operating temperature range 0C to 45C Storage temperature range -20C to 55C