Free yourself with our easy to use 4 channel wireless systems with up to 100 ft. range 24 GHz ISM band with 4 selectable channels for up to 4 systems simultaneously Rubberized shock-proof housing 24 bit/48 kHz uncompressed digital transmission Easy to start in seconds plug & play Auto-standby (sleep mode) after 10 seconds when there is no signal Rechargeable via USB (cable included!) up to 5 hours use on a single charge - Appx. 225 adjustable jack to fit almost every instrument Includes: 1 x Transmitter (black) 1 x Receiver (black) 1 x USB double head charger cable