Holman VH7950 is a remote control for irrigation systems that allows you to conveniently turn on/off the watering as needed, even when you're away from the controller. It features a 433.92 MHz working frequency, 12V to 30V AC/DC working voltage, and a temperature range of -20°C to 50°C. The device has a maximum working current of 50mA and a relay contact load capacity of 1A, 30V DC. It comes with one 23A 12V battery for the remote control.