Specification: good condition and Material: zinc alloy+plastic Input voltage: 5VDC 500mA MIN Communication distance: 400M (visible distance) Work frequency section: 2.4G ISM, 126 channels. frequency section 7 groups ID code set table, User can use 7 groups individual wireless net without any interference 2.4G wireless DMX512 receiver 126 channels jumping frequency automatically, high anti jamming ability. to ensure work reliability and Establishing Communication: 1. Power on DMX512 wireless received board first and then following to power up the transmitted board 2. Press "Key" button to set same ID value of transferred board and received board Please use different ID value if you need to use more than 1 group wireless universals at same time in same place 3. The red LED flashes when transmitter transmissions DMA data by no interfered frequency section, then receiver changes communicated frequency section Green LED flash til received corrected same ID value, LED flash more fast once DMA data more fast 4. Communication was established correctly Precautions: Please use the original charger (DC 5V 500mA min output) About 2 hours to fully charge the battery, the fully charged battery can last about 7 hours of work, and users can also use the product while charging Before using the product, please read the manual carefully, If you face any problems, please feel free to Package included: 1 transmitter with adapter+3 receivers (Built in Battery)+User Manual 1 transmitter with adapter+5 receivers (Built in Battery)+User Manual 1 transmitter with adapter+7 receivers (Built in Battery)+User Manual Because of the light radiation or computer display difference, please understand we can't guarantee photos and real color is same If you have any question, please before buying it Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.