Mini Wireless Bluetooth Stereo In-Ear Headset Earphone For Samsung iphone huawei LG 1. Item Name: Mini Bluetooth Earphone2. Bluetooth Version: V4.0+EDR3. Impedance: 324. Sensitivity: -42 dB5. Frequency range: 20 - 20K Hz6. Transmission Power: Class 27. Transmission Range: 10m8. Radio frequency: 2.402 - 2.480G Hz9. Color: White, Black, Pink, Blue, Skin Color10. Music Time: 2-3h11. Talk Time: 2 - 4 h12. Standby Time: 120 hours13. Charging Time: about 2 h14. Battery Type: 50 mA rechargeable polymer battery15. Output Power: 30 mW16. Power System: AC110-220V / DC5V17. USB Cable Length: about 5cm18. Size: about 16 * 15 * 28 mm/ 0.63 * 0.59 * 1.10 inchesNOTE1>Just for RIGHT EAR,left ear also available but not confortable.2>IT onLY AS MONO,not as stereo even if you have 2 or more in hands.Company Information