.Features: Made of high-quality material, solid, durable, and with a wide power range, designed to serve for a long time. Automatically controls tank water, drainage, and pool water levels to prevent water overflow or pump dry running. Provides protection against water full or shortage conditions, helping to protect the pump from damage. Capable of controlling upper and lower pools simultaneously. Mounting design allows installation in distribution box for reliable performance. Includes 3 probes that can be easily adjusted according to requirements for precise water level control. Ideal for well water systems, printing and dyeing, chemical, food, beverage, wine, sugar, and other industrial applications. Includes 1 automatic water level controller only; other accessories shown in pictures are not included.Specifications: Model: DF-96ED Material: Flame retardant Size: Approx. 88 x 49 x 67mm / 3.46 x 1.93 x 2.64in Working voltage: 220V Current: 30A Power: 2W Color: As shown in picture Quantity: 1 SetInstructions: 1. Single-control Upper Pool (water storage) installation: A (Red Wire) detects the highest water level in the upper pool. When water reaches point A, the probe contacts water and the controller automatically turns off the pump. B (Blue Wire) detects the lowest water level in the upper pool. When water falls below point B, the probe loses contact with water and the controller automatically turns on the pump to supply water. C (Black Wire) is the ground wire, placed in the lowest part of the pool but not touching the bottom. It is recommended to place the ground wire below point B in a metal tank. (The probe should be kept away from the tank wall.) D (Green Wire) and E (Yellow Wire) are connected to C (Black Wire).2. Single-control Down Pool (drain water) installation: E (Yellow Wire) detects the highest water level in the down pool. When water reaches point E, the probe contacts water and the controller automatically turns off the pump to stop draining. D (Green Wire) detects the lowest water level in the down pool. When water falls below point D, the probe loses contact with water and the controller automatically turns on the pump to stop draining. C (Black Wire) is the ground wire, placed in the lowest part of the pool but not touching the bottom. It is recommended to place the ground wire below point D in a metal tank. (The probe should be kept away from the tank wall.) A (Red Wire) and B (Blue Wire) are disconnected.3. Water shortage protection installation: C and D detect the lowest water level in the down pool. When water reaches the lowest level and either C or D loses contact with water, the controller automatically turns off the pump. E (Yellow Wire) and C (Black Wire) are short-circuited. A (Red Wire) and B (Blue Wire) are disconnected.4. Joint control of Upper and Down Pool installation: A (Red Wire) detects the highest water level in the upper pool. When water reaches point A, the probe contacts water and the controller automatically turns off the pump. B (Blue Wire) detects the lowest water level in the upper pool. When water falls below point B, the probe loses contact with water and the controller automatically turns on the pump to supply water. C (Black Wire) is the ground wire used for both upper and down pools, placed in the lowest part of the pool but not touching the bottom. It is recommended to place the ground wire below points B and D in a metal tank. (The probe should be kept away from the tank wall.) D (Green Wire) detects the lowest water level in the down pool. When water falls below point D, the probe loses contact with water and the controller automatically turns on the pump to stop draining. E (Yellow Wire) detects the highest water level in the down pool. When water reaches point E, the probe contacts water and the controller automatically turns off the pump to stop draining.Notes: No retail packaging. Please allow 01 cm error due to manual measurement. Please ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the picture may not reflect the actual color of the item. Thank you.Package Includes: 1 x Automatic Water Level Controller 3 x Probe