Input Signal - 4 input ports, supports up to 115,200bps, selectable auto manual switching by external switch, selectable primary secondary input by external switch. Professional manufactured, exquisite workmanship with unique design, stable performance and high reliability. Safe Operation - The marine serial line splitter supports over voltage protection, over current and surge voltage protection, reverse input and over current protection. There are wiring instructions at the wiring area to prevent wiring errors, and pluggable screw terminals for quick and easy installation and diagnostics. Design - Galvanic isolation of Each output group, input, main circuits and power, selectable RS232, RS422, TTL on 8 output port. All components are rigorously inspected and meet the strictest quality standards for stable performance and long service life. Durable Material - Isolating Buffer for NMEA Buffer Box is made of aluminium alloy , anti rust treatment, will not be oxidized and corroded by seawater or air, long term durability. In use, material is not prone to rust, and fading problems, which makes it can be used for a long time without frequent replacement. Note - The primary function of a marine serial line distributor is to connect a single serial data line to multiple devices or systems. When there is only one serial data source, the serial line distributor can distribute the data stream to several different components or devices, enabling data interaction between multiple devices. Three Operation Modes Auto/Manual Input Switching by using External Switch Auto Baud Rate detection Supports Input and Output Baud Rate up to 115,200bps Galvanic Isolation of Each output group, Each input, Main circuits and Input power each other Selectable one of RS232/RS422/TTL on 8 Output port(Grp#2 and Grp#4,Other 8ch are fixed as RS422) 1)Modes: Mode-1:1 Unit x 16 Outputs Buffer(2 Inputs) Mode-2:2 Units x 8 Outputs Buffers(Each 2 Inputs) Mode-3:4 Units x 4 Outputs Buffers(Each 1 Input) 2)Input Signal: 4 Input Ports Galvanic Isolation Supports up to 115,200bps Selectable Auto/Manual switching by using External Switch Selectable Primary/Secondary Input by using External Switch 3)Output Signal: 16 Output Ports Galvanic Isolation of Each output group Supports up to 115,200bps 8ch Output Ports support RS232/RS422/TTL Signal(Selectable by jumper) 4)Display: Red LED Input Power 4 Green Input Data Status of Each Input Port 5)Protection: Input Port - Over Voltage Protection(DC 36V 1 min) Output Port - Over Current and Surge Voltage Protection Input Power - Reverse Input and Over Current Protection Operating Temperature:-0.5-+55(-59-131) Humidity:95% Colour:As Shown Material:Plastic Size:208x152x46.5mm/7.6x5.5x1.9In Package Contents: 1 * Splitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.