Specification: Item Type: Irrigation Timer Material: Plastic Color: Black + Blue Timer Size: Approx. 20*9.5cm / 7.9*3.7inch Installation Method: 1. It is necessary to have a butterfly faucet or a water source with no thread faucet to match the controller (the unthreaded faucet needs to be connected with a universal joint). 2. Lock the controller to the faucet. 3. Hold the two blue spring pads of the controller with your left hand, and take out the control board with your right hand. 4. Buckle the battery in the direction of the positive and negative electrodes (the battery is a 9V dry battery). 5. Install back to the control board and the installation is completed. 6. Turn on the faucet for use. Battery Collocation: 1. The battery is equipped with block carbon 9V battery. 2. Battery Type: Dry Battery. 3. Series: 6F22. 4. One battery will do. 5. Note: The battery shall be purchased by the customer. Package list: 1 x Irrigation Timer 1 x Connector Notes: 1. The connection of the unthreaded faucet requires the customer to purchase the universal joint and the Teflon tape for use. 2. Threaded faucets should be used with Teflon tape.