DMX Filter Module is used to stabilize signal for DMX LED Strips. We recommend that you use this unit at each interval when cutting DMX strips to custom lengths, every 0.5m, for a clean precise signal. This product is included with the purchase of 5050-LED-RGBWP-34DMX5M (Only 1 Included). Use this DMX Filter Module as a replacement or as stand alone filter for custom length DMX strips. This 5V DMX Filter Module is IP67 water resistant.