autoaqua smart ato lite sato-260p automatic top off system water filler refiller water level controller w/ pump (sato-260p) autoaqua why choose smart ato lite? smart ato lite is a compact auto top off system for both nano and medium aquariums. combined an ato level sensor and a fail-safe sensor in one pack and integrated with qst (quick security technology), which provides real-time protection against any failure and detects water empty, smart ato lite offers you a safe and economical choice of auto top off systems. features: //the smallest ato system currently available //suitable for nano / medium aquariums //extremely easy to install with integrated magnetic mount //no moving parts to fail //dual-optical level sensor in one pack provides dual protection //qst (quick security technology) provides real-time failsafe protection against failure //led light alert //everything needed is included. specifications: power input : 100-240 vac, 50-60 hz cable length of power adapter: 180 cm (6 ft) dc pump : head : 8.2 ft (250 cm) flow rate : 74 gph (280 lph) max mounting thickness : 1/2 inch (12.7 mm) power : 4.5 w @ dc 12 v pump cord length : 6 ft (180 cm) length of cable between sensor and controller : 120 cm (4 ft)