Donner 8pcs DMX512 DMX Dfi 2.4G Wireless 7 Receiver Built-in Battery & 1 Transmitter Stage Lighting Control Latest design wireless DMX512 receiver have a built-in battery, don't need power adapter any more when it works. 2 hours full charging time,8 hours working time. Users also can use the product while charging. Metal Black Shell. ID Code "1-7" groups ID code,press 'KEY' for setting,it only can work under same ID code of transmitter and receiver. (Same LED Color). This product adopts a 2.4G ISM frequency section. High effective GFSK modulate, communication design.No time delay when signal data is transmitting, signal data is real time and reliably. RF frequency 2.400 - 2.525G.126 channels jumping frequency automatically, high anti-jamming ability The red LED flashes when transmitter transmits DMX data by no interfered frequency section, then receiver changes communicated frequency section. Green LED flash till received corrected same ID value, LED flash more fast once DMX data more fast.