Programming control in the palm of your hand. With 100% waterproof and rugged construction, the BL-KR is ideal for isolated sites and power-restricted areas. No more crawling around the valve box to program or troubleshoot a battery-powered timer. Programming is easy with a smartphone or tablet through direct Bluetooth communication up to 35′ (10 m) away from the valve box. Add multiple controllers (up to 400 timers) and program simply and quickly from 1 free application.