Product No.£ºHF-600 1¡¢Speak caller name or caller number( support multiple languages selection) 2¡¢Phone book synchronization function 3¡¢Advanced built-in microphone and speaker 4¡¢Echo cancellation & noise suppression 5¡¢Full duplex sound quality 6¡¢One-touch answer, call rejection, last number redial 7¡¢Voice dialing function( voice activation subject to voice activation enabled phone Product specification: 1¡¢Compatible Bluetooth specification:V2.0+EDR 2¡¢Operating frequency band: 2.4-2.48GHZ unlicensed ISM band 3¡¢RF output power: Class 2 4¡¢Working distance: up to 10 meters 5¡¢Support profiles: headset and hands free 1.5 profiles 6¡¢Battery type: rechargeable lithium DC 3.7V 650MA 7¡¢Talk time: 8-10hours 8¡¢Standby time: 600hours 9¡¢Charging time: 2-3hours 10¡¢Size: 118*46*16MM