Hunter NODE400 4-Station Battery Controller is the smart, reliable solution. The NODE mounts to a valve's solenoid quickly and easily, and without screws, drills or additional wires. The unit's solid construction and full waterproof exterior ensure it can handle the harsh environment of any valve box. The NODE is powered by one or two 9V alkaline batteries and provides standard or extended power throughout the season. Along with exceptional reliability, the NODE features an easy-to-program LCD screen, the ability to control a Pump Master Valve, and is faster to program with Hunter's simple wizard with 3 programs and 4 start times per program. The array of programming options and rugged reliability make the NODE a compact, but powerful irrigation controller with the flexibility of battery or solar power.