5V 4--Channel Relay Module for Arduino PIC ARM DSP AVR Electronic is available now from our US and UK warehouse Free shipping to US and UK in 3-6 business days ship to Other European countries in 7-10 days 5V 4 Channel Relay Module Shield For Arduino PIC ARM DSP AVR Feature: AC voltage maximum: 250V AC current maximum: 10A DC voltage maximum: 30V DC current maximum: 10A Working voltage: 5V Drive ability: 8550 transistor drive Power indicator(green)， four ways of relay status indicator light(red) Has the fixed bolt hole and easy installation Size: 7.5 x 4.8 x 1.7cm Weight: 60g Specification(6 wire): VCC external: 5V GND external: GND IN1-IN4 interchange relay control interface by single chip IO Package included: 1 x 5V 4 channel relay module