One-way automatic timer. 63 preset programmes (+ off and 5-minute test). Easy programming by way of 2 knobs: one with 7 frequencies, the other with 9 watering times; simply turn the knobs for the required setting. Equipped with washable filter. Powered by a 9V alkaline battery, which will last an entire season. Electronic components are perfectly sealed. Operating pressure from 0.2 to 12 bar. 100% checked and tested. shock-proof and weather resistant great versatility