Genius 4.0 Bluetooth Headset HS920BT. Easily connects to any Bluetooth devices such as smart phones and tablet PC's. The HS920BT's 40mm drivers has clear sound quality for streaming music along with a built in microphone lets you answer phone calls instantly with access at your fingertips. Built in Lithium Ion rechargeable provides up to 8 hours of music play. Bluetooth 4.0 is backwards compatible. Bluetooth 4.0 provides faster speed in data transmission and low power consumption. Color White