Manually pre-set the run time and frequency of watering and the water timer will automatically switch on and off after serving water to your plants through a drip irrigation or sprinkler line ( Please note and ensure that the water emitters installed receive proper flow of water with a reasonable or required pressure ) . This package include only one Greenage water timer with single outlet used for automatic drip irrigation. Also included the following items : 1) 3/4 to 1/2" size Converter/Reducer 2) 16mm female lock adapter to connect the timer with your 16mm Drip irrigation polyethylene hose 3) PTFE thread sealing tape to tighten the threaded fittings . 4) 5 pieces of free drippers 5) One miece of microjet with 4mm adapter 6) A punch tool - Please note: For the initial set up, you have to wait until the frequency that you have set to see the timer functioning for the first time. For example, if you set it for a one hour frequency with a 5 minutes run time, then you have to wait for one hour to see the timer working for the first time. Always use new-high quality and branded batteries. Our water timer has one year warranty (from the date of our sales invoice )against any manufacturing defect.In case of complaints,please report us immediately and before the warranty expires. Our existing and satisfied customers can enjoy special discount on their new or additional purchase in case the product becomes defective or malfunctioning after its warranty period .Please contact us directly for details.