Syllable Portable D50 Bluetooth V3.0 Car Wireless Cordless HD Voice Handsfree Mono Headset Headphone Earphone with Micphone for Driver iPhone Samsung HTC LG Blackberry & More Smartphones(Black) Built-in Bluetooth audio codec bandwidth of up to 3Mbps speed transmission, high-definition and high-grade calling sound. Enjoy music when out of business. Safe driving/workout: hands-free incoming call answering. Adding the power control mechanism, and a built-in rechargerable lithium battery as well.No worry to out use of power consumption Light in weight: as light as 9 grams. Never a burden on your ear. Using generic amp Bluetooth protoco and a plurality of alternating high rate of speed broadcast technology and bluetooth 3.0 high-speed chispt,pairing in 10 seconds.Compatible with all bluetooth enabled devices.