This keyboard features advanced Bluetooth technology for cable-free ease of use. The frequency-hopping and auto channel switching design ensures interference-free operation in a crowded space. The keyboard stays connected to the Bluetooth system without having the need to reconnect even when the power is low or the system is turned off. The slim scissor key construction offers low-profile keys, reduces key travel distance and minimizes figure fatigue. In addition, 3 volume-control hot keys provide additional ease of use. Great for conference room, lecture hall, classroom and home office settings, this keyboard offers up to 33-foot range without line of sight.