V 4.0 Enhanced Data Rate / High Speed / Low Energy / Blurtooth technology is a short-range communications technology intended to replace all those cables we usually endure whether in portable or fixed devices while maintaining a high level of security and having the ability to siultaneously transmit data and voice transmissions.Manufacturing specifications require a minimum of 30 feet but can transceive much further. This device meets all the maximum requirements of these standards. thnx for stoppin' by Chuck