Wireless Bluetooth Earbud 
Elegant, Small and Comfortable wearing with silicone clips
Built-in microphone and full audio control
Works with Bluetooth Smartphones & Tablets
Recharge battery with included Micro USB Cable

Speaker diameter:Φ10mm
Impedance: 32Ω
S.P.L:105dB S.P.L.at  1KHz
Rated power: 10mW
Frequency Response: 50Hz-10kHz
MIC type ： Capacitive 
Microphone Unit:Φ4*1.5mm
Directivity: Whole direction
Sensitivity ：S.P.L:-42±3dB
Impedance:≤2.2KΩ
Frequency Response: 30-16,000HZ
Operating voltage: 4.5V

Bluetooth version:4.1
General Feature : Pick UP a call, end a call, reject a call, call redial, transfer a call, volume adjustment , voice dial
Battery:60mAh, Lithium polymer battery
Play time : Up to 3 hours 
Talk time : Up to 4 hours 
Standby time : Up to 120 hours 
Operating Range : Up to 10 meters