Description: Brand new and high quality. 5 v, 16 - Channel Relay interface board, and each one needs 15 to 25 ma Driver Current. , Equiped with high - current relay, AC250V 10 a;DC30V 10 a. , a Standard interface that can be controlled directly by microcontroller (for the Arduino, 8051, AVR, PIC, PLC, DSP, ARM and ARM, MSP430, TTL logic). Indication, LED \ \ \ 's for Relay output status. Size: 18 cm x 9 cm x 1.8 cm (5.47 inch x 2.04 inch x 0.67 inch).