SIYN Sports Stereo Music Headphones Headsets Earphone For Samsung Galaxy S5 S4 S3 Note 3 2, iphone 5s 5 5c 4s ipad ipod Touch and Android Tablet CellPhones 1.Support Bluetooth V4.0, Bluetooth A2DP and call. 2.Talk time: 8-15 hours, play time: 6-10 hours Music Playing Time: up to 10 hours 3.Charging voltage: Micro USB 5V Working current: 25-35mA Bluetooth A2DP Working range: 10m 4.Sensitivity: 80dB Impedance: 32 ohms peaker Power: 2 x 18mW 5.Output power: 2x20mW Frequency range: 2.401-2.480GHz Distortion factor: 1%