Smart ATO Lite 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. Model: SATO-260P 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 Includes: Smart ATO Lite Controller x 1 Power Adapter x 1 DC Refill Pump x 1 Universal Tube Holder x 1 Siphon Break x 1 Tubing 6.5 ft (200 cm) x 1 Specifications: Power Input : 100-240 VAC, 50-60 Hz Cable Length of Power Adapter: 6 ft (180 cm) 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) Flexible Tubing Size : ID : 6.5 mm / OD : 9.0 mm Length of Cable between Sensor and Controller : 4 ft (120 cm) Installation Diagram: *Please avoid setting up the sensor in an area with micro bubbles or direct light.