Lightweight bluetooth headset SWISSTEN CALLER, with a pleasant ergonomic design for secure calling. Packed in SWISSTEN retail pack. For two smartphones Up to two bluetooth devices can be connected to this headset. Low weight SWISSTEN Caller headset weighs only 7 grams and you can use it full 4 hours of calls Clear Voice Capture CVC technology Noise reduction technology. The purpose of CVC is to filter out background noise so that people can hear your voice more easily, making phone calls more enjoyable. Specifications Chip: GN100Standby mode: up to 140hTalk time: up to 4 hoursWeight: 7gCharging time: 2.5 hoursBluetooth: V5.0Profiles: A2DP, HFP, HSP, AVRCPTechnology: CVC "Clear Voice Capture"Range: 10mBattery capacity: 70mAhMaterial: PC + ABSConnector: microUSB