Features: 1. This delay relay switches on for some time after power-on, then switches off for some time, and cycles the above process. 2. Output adopts optical coupler isolation to strengthen the anti-interfere ability. 3. Industrial grade circuit board, stable performance. 4. With power-off memory function to save the setting parameters. 5. This relay has long service life, widely used to control the on-off of solenoid valve, water pump, motor, etc. Specification: Model: YYA-3 Timing range: 0s-999min adjustable Supply voltage: DC 5V Static current: 20mA Working current: 50mA Life: >100000 times Working temperature: -40~85 ℃ Weight: Approx. 25g Time setting: After power-on, start the countdown. The first three times to press k1 can set the time to switch on, and the last three times is can set the time to switch off. Press K1 to change the position of time setting, press K2 to change digit. After the digital tubes do not flash, press K2 to change the position of decimal point. Timing range varies according the position of decimal point: XXX. - timing range: 0 ~ 999 minutes XX.X - timing range: 0 - 99.9 seconds XXX - timing range: 0 ~ 999 seconds After you finish the time setting, you can press and hold K2 to turn on/off the digital tubes. Package L ist: 1 * Cycle Delay Relay