Product specification: Name: Water Timer Gravity Fed System Dripper / Irrigation Hydroponics Grow;  Material: ABS plastic;  Color: Orange;  Size: 65 * 95 * 118mm;  Packaging size: 138 * 68 * 105mm;  Gross weight: 216g;  Type: UK/US(optional);  Type A - UK;  Type B - US;  Flow: 5-35L/min;     Features 1. One-key operation, convenient, simple and fast.  2. Watering frequency: every 1/2/3/4 ... 7 days.  3. Watering duration: 1/2/3/5 ... 55 minutes, long press the operation key to enter manual irrigation.  4. The inlet thread is available in 1 inch and 3/4 inch, powered by 3 AAA1.5 V alkaline batteries.  5. Allowable working environment temperature 3 ℃ -55 ℃, working water pressure 0.5bar to 8.0bar.  6. Waterproof grade IP65, waterproof battery compartment with O-ring.  7. Core diaphragm solenoid valve, ABS housing.  8. Flow rate from 5L / min to 35L / min.     Package included: 1x Water Timer Gravity Fed System Dripper