LDNIO 2 in 1 CM20 Mono Bluetooth Headset plus Car Charger With Auto On-Off Button,Multiple Point connectivity, 2.4A USB Fast Charging Description: STATE OF THE ART EARBUD DESIGNÿ? The mini Bluetooth Headset offers you extreme comfort and fit securely in your ear. GREAT QUALITY SOUND? Quality Earbud with Bluetooth V4.0 , HEP , HSP , A2DP for Best Stereo Sound. Clear high & low volume. LONG BATTERY LIFEÿ? up to 4 hours of continuous talk time, 96 hours of Standby time, wireless range up to 10 meters/ 33 feet ACCESSORIESÿ? 3 Rubber Ear Caps to fit your Ear Size. Works on Shrapnel type cigarette lighter. Specifications 1) Bluetooth Specification : Bluetooth V4.0.ÿ 2) Support Agreement : Headset Hands-Free A2DP Avrcp.ÿ 3)Transmission range : 10meters.ÿ 4)Transmission Frequancy : 2.4GHz.ÿ 5)Charging Voltage: DC 5V.ÿ 6)Charging Time : less than 2 hours.ÿ 7)Talk Time : more than 3.5 hours.ÿ 8)Musical Playtime: more than 2 hours.ÿ 9)Standby Time: More than 40 hours.ÿ 10) Battery Capacity : 40mAH.ÿ Package Incuide : 1 x Bluetooth Headset. 1 x Car Charger with USB Port What's in the box 1 x bluetooth Headset