About this item:Latest bluetooth 4.1technology， offering you perfect HD stereo sound. And it's easy and fast pairing with smartphones， tablets and other Bluetooth enabled music devices. Can connect with 2 cell phones or tablets at the same time. So you will not miss any important calls.IPX7 level sweatproof technology and never drop off when you do sports. Semi-closed ergonomic in-ear design to specifically fit the contours of your ears， comfortable for all-day use. With 3 different-sized wing stabilizers， so they stay in place when you're running， gym， fitness， workout， sports & exercise and other activities.Unique magnet attraction design: Portable， user-friendly and popular MAGNET ATTRACTION design， let the headphones hang like a necklace around your neck， very easy to store into your clothing or bag， and not easy to fall off.Built-in duarable rechargeable Lithium-poly battery， last up to 6-8 hours talking/ playing time， 2 hours charging time， 200 hours standby time， so you have less time charging and more time doing. Support IOS and Adroid DEVICE POWER DISPLAY.Easy operation: control all functions of your music (volume， sound， song selection) and calls from your phone via our simple-to-use user interface controller.IPX7 level sweatproof technology Hands-free: Yes Bluetooth Version: V4.1+EDR Chip: CSR8640 Working scope: ¡Ü10m Support agreement: A2DP， AVRCP， HSP， HFP Impedance: 16¦¸ Sensitivity: 109dB Distortion rate: 1% Noise reduction: CVC6.0 Battery: 120mAh Talking Time: about 8 hours Music Time: about 6-8 hours Standby time: about 200 hours Charging Time: about 2 hours Weight: 16.5g Package included:1x Sport headset1x Charging cable1x User manual