Mini TTL Amplifier 3 pin RGB WS2812B WS2811 16703 SK6812 WS2815 WS2813 IC TTL Amplifier 1 to 8 / 1 to 4 SPI Amplifier Signal Repeater For Full Color LED Strip.LED Pixel Signal Repeater Amplifier Controller for WS2812B WS2811 SK6812 LED Strip Lights, DC12V/24V.Signal amplifier (repeater) receives one way SPI signal, output signal Symphony 8 control group, multi-group Symphony of dream-color strip light changes in effect; and an amplifier used for signal output via SPI, the theory can be cascaded countless signal amplifier.This amplifier is used for DC12V/DC24V WS2811, WS2812B, SK6812, WS2812B,1903,16703 SK6812 WS2815 WS2813 led pixel strip module signal repeater.Output: 8pcs SPI signal/4pcs SPI signal.Package included: 3 pin RGB IC TTL Amplifier 1 to 8.