Check the listing for details. Aquarium ATO Auto Top Up Off System DC Pump Water Level Sensor , Float Switch. Condition: New. Listed at 31.99 USD. Description Extremely easy to install with Acrylic Mount. Good looking.Dual level sensor in one sensor provides dual protectionEverything needed is included This ATO 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, which provides real-time protection against any failure and detects water empty, Smart ATO offers you a safe and economical choice of auto top off systems.Features:The smallest ATO system currently availableSuitable for nano / medium aquariumsNo moving parts to failDual level sensor in one pack provides dual protectionEverything needed is included. Specifications:Power Input : 100-240 VAC, 50-60 HzDC Pump :Head : 4.5 ft (150 cm)Flow Rate : 45 gph (200 lph)Max Mounting Thickness : 0.6 inch (15mm) Package includes: 1 x single sensor kit/ 1x dual sensor kit Shipping 1. Orders processed within 1 business day after received payment. 2. We only ship to ebay addresses. Your ebay address must match your Shipping address. 3. We will track the shipment and get back to you as soon as possible with a reply. Return 1. We accept Return within 30 days for refund or replacement. 2. Confirm for address and reference number before return, we will offer replacement or refund after received the return parcel. Customer service If you have any question ,please sent me ebay message. we usually reply within 1 business days as quickly as possible. We greatly appreciate your positive feedback and will do the same. We treasure every feedback from our customers, We strive for 5 star positive Feedback on all transactions. If you are considering giving a neutral or negative Feedback or a low DSR (1's, 2's). Do write to us and give us an opportunity to resolve it for you firstly for your satisfaction.