DescriptionThis awesome wirelessearphone with microphone, allows you to answer / reject phone calls or listen music anytime and anywhere. It is easy to operate buttons. Just simplify your communications with this lightweight and versatile earphone. It is a good choice for listening music, watching movie, talking on the phone, etc.Features- Color: Blue.- Material: ABS.- Size: 2 * 2 * 2.5cm / 0.8 * 0.8 * 1inch(L * W * H).-version:V4.0- Transmission range: 10m- Frequency range: 2.402GHz-2.480GHZ- Wireless transmitter standard: Class 2- Frequency response: 20Hz-20KHz- SNR: 85dB- Battery: 3.7V / 60mAH- Talking time: About 4 hours- Listen music: About 3 hours- Standby time: About 3-5 days- Charge time: About 1 hour- NEW GENERATION:V4.1 and 4.0 smart chip, efficient and stable data transmission, Compact and ultra Light Design Stereoearpiece. Hands free for you to do eveything with the earpiece.- LONG-LASTING: 50 mAh rechargeable polymer battery provide up to 4 hours talking time(music time:3 hours;standby time:120 hours).- AWESOME COMPATIBILITY: Compatible with Any -Enabled Devices, supporting connecting two devices at the same time.- BUILT-IN MICROPHONE: Invisible, smallest and one-button design. Digital noise-cancelling provides clear and natural voice. You DO NOT even feel its existence, but it does.- HANDS FREE: Get free from wire binding up, bring more convenience when working out, doing sports and other activities. Get rid of the trouble wire bring.