Dual float ball sensor for overfill protection: When the water is below the minimum water level, the power supply will be activated, the pump will automatically operate and will shut off when the water level reaches its maximum value. When the first float fails, the second float will work.
It is suitable for aquariums tank up to 5/8"(16mm) in thickness.
Siphon break: It is recommended that the water level of display tank be higher than the reservoir, and don't leave the end of the water supply pipe in the water, otherwise, it will siphon after the pump shuts off, if so the siphon break must be installed at the end of the water supply pipe.
With a pipe holder: Enable the tube to be attached to the bracket.
Smooth edge will not scratch the fish.The bracket and holder is made of high-quality PC.

 
 Features & Specifications
●Dual float ball sensor for overfill protection
 The second sensor provides real-time protection against failure of the first sensor. You never have to worry about the water coming out. When the water is below the minimum water level, the power supply will be activated, the pump will automatically operate and will shut off when the water level reaches its maximum value. When the first float fails, the second float will work.
 It is suitable for aquariums tank up to 5/8"(16mm) in thickness.
 ●Smooth edge will not scratch the fish.
 ●Siphon break: It is recommended that the water level of display tank be higher than the reservoir, and don't leave the end of the water supply pipe in the water, otherwise, it will siphon after the pump shuts off, if so the siphon break must be installed at the end of the water supply pipe.
 ●Adjustable water level is 5 inches. 
 ●The bracket and holder is made of high-quality PC.
 ●With a pipe holder: Enable the tube to be attached to the bracket.
Pump:
 Rated voltage: 12VDC
 Max power: 5W, Rated current: 0.5A
 Waterproof grade: IP68
 Max lift: 0.4-1.5m
 Max flow rate: 200L/H
 Noises: <40db
 Material: PC ABS
 Wire length: 4.6ft (1.4m )
Power adapter:
 Input: 100-240VAC,
 Output: 12VDC, 1A
 Wire length: 3.3ft(1m)
What is included in the package? 
 1 x Holder
 1 x Dual Float Ball Sensor with a 3.28ft (1m) cable 
 1 x Pump
 1 x Power Adapter
 1 x Splitter Adapter Cable
 1 x 8.2ft(2.5m) Silicone Hose
 1 x Siphon Break
 2 x PC Screw