DESC: These Air Switches are designed to control one piece of equipment with one air button. The switch can safely control loads without electricity at the pool or spa or tub side, for example a pump, blower or a light. Each time pressure is applied to the remote air button the connected equipment will operate as described in the table. Model RC2113ST has a built-in 10 minute automatic shut down timer. However, the operation can be stopped any time during the cycle by simply pressing the air button.