Features: Allows automatic watering for constructions without access to alternating current power supply. Practical battery indicators indicates the need for battery replacement. 3 flexible programs, each with 4 startups time, can run for up to 6 hours. The waterproof outer sealing rings can prevent water ingresses. Seasonal adjustment allows for faster adjustment of plan without changing the running time. Specifications: Materials: ABS+metal Diameter: about 8.9cm/3.50inch Height: about 6.4cm/2.52inch Battery: 2pcs 9V dry battery (not included) Station output: 9-11VDC electromagnetic head Water pump/main valves output: 9-11VDC solenoid head Note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color. Package includes: 1pc Sprinkler Controller