Bluetooth v4.2+EDR, support stereo music, Supermini true wireless in-ear design, portable and cool. Built-in rechargeable battery, come with a charging cable. Noise cancellation design, perfect sound quality, Sweat Proof. Built-in microphone, answer/reject phone calls conveniently. Compatible with most Bluetooth-enabled Mobile phones/tablets/PC/Laptop. Support systems: Windows/iOS/Android Best for Hands-free & Music while driving/walking/Gyming/Running/Work Out/Sports and Other Outdoor Activity.