Feature:1.Compatible: Compatible with 99% of Bluetooth devices ,smart phone, Bluetooth-enabled Tablets etc; the Wireless Range up to 15-20 meters.2.Long Battery Life: Built in 35 mAh lithium polymer battery, enjoy up to play time about 1.5-2 hours of Full Charge, up to 100 hours of time waiting period. The 420 mAh charging case can fully recharge the bluetooth headset 2-3 times3.Latest Bluetooth Wireless Technology: 5.0 with A2DP / AVRCP support, ensure strong signal transmission at high speed and offering high quality stereo music, make you relax in the world of music easier. You can share this with the people around you.4.Single & Dual ear Calling: 1-[Dual Earphone Mode] use both earbuds simultaneously to enjoy 3D true stereo sound. 2-[Single Earphone Mode] use either the left (L) or the right (R) earphone separately. One earbud can connect with one device separately. 5.Automatic Connection: Earbuds turn on by itself when taking out from charging box and automatically connect with device after first time connectionSpecification:1.Weight: 100 g / set2.Bluetooth version: 5.0 Bluetooth Headset3.Play music / talk time: about 1.5-2 hours4.Battery Type: Rechargeable Lithium Polymer Battery5.Function: dual ear calling, auto-connection6.Range: 15-20M7.Sound quality: Stereo subwoofer sound8.Charging time: 2-3 hours9.Loading method: magnetic adsorption10.Compatible: Apple iOS, Android, Pad, almost all bluetooth devices (BT V4.2 or above)