[. . . ] If you find a problem with this fixture, please return to your supplier for repair. [. . . ] Do not open the fixture by yourself, there are no user serviceable parts inside Check input voltage before connecting this fixture. Operation Instruction This user manual is for use with both the QTX Light Single and Double Derby LED Light Effects. 151. 571 and 151. 572 LED Derby Lights use High Power LED's to make the colorful effect. The two operating functions are Sound and Auto. 2 User Manual Power 151. 571 / 151. 572 These light effects also have an IEC power mode daisy chain facility allowing you to run up to 5 light effects from one 240v power source. Modes: Sound mode: The various effects will be controlled by the Sound Potentiometer and the light effects will change with the beat of the music. You can adjust the sensitivity by adjusting the sensitivity knob to the left for less sensitivity and to the right for more. If the fixture does not power on, please check the power connection and fuse. If the fixture still does not work, please return to your supplier for repair. Do not open the fixture by yourself; there are no user serviceable parts inside 3. If you have any questions about this manual, please contact your supplier Specification 151. 571 Single Derby Power LED Quantity LED Beam Angel Modes Weight Size 220-240VAC 50Hz 6pcs of 3W (2 x Red, 2 x Green, 2 x Blue) 130°; Luminous Flux: 80LM Sound, Auto 5. 45kg 350 x 330 x 175 mm 151. 572 Double Derby 220-240VAC 50Hz 6pcs of 3W (2 x Red, 2 x Green, 2 x Blue) 130°; Luminous Flux: 80LM Sound, Auto 8. 23kg 370 x 370 x 284 mm 4 [. . . ] Do not open the fixture by yourself; there are no user serviceable parts inside 3. [. . . ]