1. Liquid medium: clean water 2. The maximum temperature: 0-40 degrees Celsius 3.The watering frequency (via rotary switch control), specify minimum continuous output mode watering valve opening time of one minute, the longest continuous output valve open watering time is 120 minutes. 5. watering cycle (via rotary switch control) that specifies the minimum cycle time period is one hour, the longest cycle of 72 hours. 6. Use of Power: 3V, AAA battery 2, (the 7th ordinary battery 2 not including) Use: Insert the battery (first into the battery, the valve will check again, the ball will automatically go to the OFF state); B rotary switch to the desired point in time cycle; A rotary switch to the desired continued watering point in time; valve within 10 seconds, according to the procedure set automatically work. Note: The cycle time setting can not be less than the duration of the open valve output; B rotary switch to 0 state, the valve open watering only once; A rotary switch in the OFF state, the valve will close the valve.