Feature: 1. With 8 Channel: Comes with 8 channels, this control module can connect multiple devices at the same time. 2. 3 Jumper Modes: Can easily switch among 8 channel inputs, 8 channel outputs, 4 inputs and 4 outputs modes. 3. 9600BPS Baud Rate: The default Baud rate is 9600BPS, and the high speed ensures quick and accurate control. 4. Good Durability: Made of 1.6mm thick PCB double sided board, sturdy and durable, has a long service life. 5. Convenient Use: Large heat dissipation area enables fast cooling and stable working, also easy to carry. Specification: Item Type: Input Output Control Module Product Material: PCB Product Model: N4DIG08 Working Voltage: DC 12V (6-24V) Working Current: 10-16mA Jumper Mode: 8 channel input, 8 channel output, 4 input 4 output. Input Mode: Low level input (default) and high level input (3.3V/5V TTL). Output Mode: Low level (default) and high level output (5V TTL). Default Baud Rate: 9600BPS. Package List: 1 x Input Output Control Module