Feature:1. USING RADIO FREQUENCY TECHNOLOGY: Using radio frequency technology, the signal can pass through, floors, and doors to stably control the receiver anywhere within a reliable distance.2. LONG TERM STABILITY CONTROL: This remote control switch receiver 30A relay can load high power electrical appliances to ensure long term stable control.3. HIGH LEVEL OF SECURITY: The learning has a high level of security because of its low repetition rate and relearning mode. When the remote control is lost, it can delete the old and relearn the new code, so you can control it at any time.4. STABLE AND RELIABLE PERFORMANCE: Very easy to set up, learn, relearn and control. The performance is stable and reliable, and the receiving sensitivity is high. Equipped with a remote control, it is more flexible to use.5. WIDELY USED: Widely used, mainly used in lighting, electric doors, lifting equipment, gates, elevators, industrial control and security industries and other fields.How to Use:About working methods:Lock: Relay: press ‑> open; press other buttons ‑> close.Regarding learning and clearing methods:Learning: Press the learning button until the indicator light turns on, release your finger, and press any button of the transmitter. The indicator light flashes three times, indicating successful learning.Clear: Press and hold the learning button for about 8 seconds, the indicator light changes from ON to OFF, and then press the remote control, the relay doe