Bluetooth mode: stereo + connect two mobile phone Frequency range: 2402MHZ-2480MHZ Receiving sensitivity: -80dbm Wireless transmission standard: CLASS2 Emission range: about 10 meters Frequency response: 20HZ--20KHZ Signal to noise ratio: >80dbm Speaker output power: 2*10mw Battery: lithium polymer battery 80maH Charging time: <1 hours Continuous call: about 5 hours Music Time: 5 Hours Standby time: about 100 hours Color:Blue，Yellow，Hot PinkBluetooth Version 4.1Bluetooth Profiles: Headset & HandsfreeSupport Various Bluetooth enabled devices， for example mobile phone， PDAGET BLUETOOTH HEADPHONES FOR: Wireless Music + Calls with Complete Remote Controls.X-FitTM: Over/under-ear fit options. Over-ear lifts cord off neck， liberating your workout.Signal PlusTM: For skip-free music outdoors， use music device anywhere on your body.JennaTM: Offers voice prompts for easy use.