All-in-one digital wireless lavalierset for those who speak featuringSennheiser's renowned ME 4 clip-on microphone (electret, cardioid). Setting a new standard Where there once were limitations, there are now opportunities. Evolution Wireless Digital breaks the boundaries by providing more dynamic range than any wireless system on the market, automatically securing the most reliable signal in a matter of seconds. And it doesn't stop there; scalable up 90 channels with latency that is practically non-existent. Previously only found in our higher-end Digital 6000 and Digital 9000 wireless systems, an equidistant tuning grid equally spaces frequencies alongside each other, replacing the need for RF coordination or wireless expertise of any kind. Along with that comes the elimination of intermodulation dropouts and an easier-to-use system overall. An engineer in your pocket The power of Bluetooth Low Energy puts full control right in the palm of your hand with the Sennheiser Smart Assist app. Take advantage of an automated setup, remote monitoring and mobile access to every system setting, all from the convenience of your Android or iOS device. Save time, save energy, and focus on your performance.