... MP3,computer,cellphone, nice appearance,and competitive price . technical index:*Bluetooth standard: V2.1+EDR*Signal Frequency: 2.4-2.48Ghz ... power: class2 *Measurement: 48mm*40mm*20mm *Weight: 43.25g*Function: Headset/Handfree /AVRCP/A2DP Profile *Working range: 10M*Talk time: ≥6 ... 100-240 V AC, Output: 5V DC*Standard Layout: 1*Bluetooth headset+1*Charger+1*Ear hook+1*Product manual