Securely plug one end of the phone cord into the RC15, and the other end into the phone-type jack located on the bottom of the 1000W, 1500W, 200W and 2500W. Use the RC15 to turn on on your power inverter by pressing the ON/OFF button. To turn off your power inverter, simply press the ON/OFF button again. The RC15 is equipped with a 15 foot cord to provide you with flexibility in mounting and usage. Dimensions: 6.2 cm x 5 cm. Weight: approximately 0.3 kg.