1 Channel 5V Low Trigger Input Relay board with opto isolation and TTL input suitable for microcontroller projects.  Can be controlled directly with a Microcontroller including, Arduino, 8051, AVR, PIC, DSP, ARM, etc.

Module size, 50 L x 26 W x 19 H mm, Fixing mounting holes 3.1mm dia spacing 4.5 and 20.5mm, Relay voltage +5vdc, Relays AC250v 10A, DC30v 10A, TTL input to switch each relay requires 15 to 20mA driver current.

The picture shows the 12V relay version  The colour of the PC board may vary depending on the supplier, but the specifications are the same.

Please Note: This product is hobby use only and should only be used with low voltages circuits, as it has not been Safety tested to be Australian compliant when used for 240v AC mains.