SunFounder 5V 1 Channel Solid State Relay Board for Arduino Uno Duemilanove MEGA2560 MEGA1280 ARM DSP PIC 1.Omron 5V solid state relay (240V, 2A), output port with resistance-type fuse (240V, 2A) 2.Size: 25 x 34 x 25mm 3.Input power source: 5V DC (160MA) 4.Input Voltage of Control Signal: 0-2.5V (low level state), the relay will be on; 3-5V (high level state), the relay will be off. 5.Triggered at low level.