WEIGHT 40 g DIMENSIONS 46 x 36 x 95 mm (L x W x H) BLUETOOTH ® SPECIFICATION V2.1 + EDR (Enhanced Data Rates) FREQUENCY RANGE 2.4 GHz spectrum MULTIFUNCTION BUTTON Pairing Answering a call End call Reject Call Redial Calls using voice (availability of this feature is used by the mobile phone dependent) BATTERY Rechargeable lithium-polymer, 3.7V, non-replaceable CALL DURATION Up to 7 hours STANDBY TIME Up to 300 hours CHARGING TIME 2 to 3 hours REACH up to 10 meters