TX4EVS transmitters are one of the design highlights in the new Evolution program. A blue LED indicates the 868 MHz frequency of the TX4EVS. The matt black color provides a very elegant accessory that one is proud to carry on the key chain. The sliding cover prevents the consumer from unintended operation. To train the new transmitter, the well known simple way, to press the learn button on the operator, remains the same as with all LiftMaster transmitters. The 4-channel transmitter allows you to monitor and to close up to four garage.