Bluetooth v4.2+EDR, support stereo music, Super mini 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 phone/tablet/PC/Laptop. Support systems: Windows/iOS/Android. Best for Hands free & Music while driving/walking/Gyming/Running/Work Out/Sports and Other Outdoor Activity.