How does levition 6696 switch work? - Leviton #601-6696-I Ivory Wireless 3WY Switch

The Leviton 6696 Anywhere RF(Radio Frequency) lighting control allows you to add an additional (wireless) switch to an existing switched light(s) without having to hard wire it. For example, let's say that you have a bedroom with a switched overhead light. The Leviton 6696 RF receiver would be installed in place of the existing light switch. It will still function and is wired the same as an ordinary switch. The Leviton 6696 Anywhere RF transmitter (after installing the batteries) can then be used anywhere within 50 feet of the receiver (that replaced the existing light switch) to also control the light. You don't have to mount the transmitter if you don't want too. It can be on the night stand, (or carry it with you if you want) so you can turn the light ON and OFF from the bed or wherever.