Features 1、brand new and high quality. 2、Made of the high quality miniature optocoupler, anti‑interference ability, stable performance 3、Adopt 9.5mm black barrier terminal and standard 30A terminal which is stable and reliable. 4、Four ways can select high/low level trigger. 5、Available in three style for you. Specification Features: 1. brand new and high quality. 2. Made of the high quality miniature optocoupler, anti-interference ability, stable performance 3. Adopt 9.5mm black barrier terminal and standard 30A terminal which is stable and reliable. 4. Four ways can select high/low level trigger. 5. Available in three style for you. Specification: Condition: Brand New Model: YYG-4 Weight: Approx. 175g / 6.2oz Size: Approx. 130.4 * 69.0mm / 5.1 * 2.7in Package List: 1 * Four Way Relay Module Package List