CONTROL MODE - Sound control/self-propelled mode is controllable, it will automatically synchronize with your music or any sound source (even your voice) to control the flashing of the lights. The plastic case is lighter, more dangerous to prevent the metal from falling. VARIABLE SPEED CONTROL - Turn on the red switch to activate the sound control/automatic mode switch; turn the blue knob: you can adjust the sensitivity of the light to the music flicker, so that the speed of Stage Lights can be controlled from slow to fast. LED STROBE LIGHT - Lightsource is made of LED 5050 SMD lights, high intensity and reliability. Long lifespan Up to 10000 hours. This is a strobe light, not a static light. The Mini flash light USES - Bars, parties, Christmas, KTV discos, weddings, DJ/band/stage performances, clubs, discos, small private parties, family celebrations, friends gatherings and birthday parties, etc. WARNING - Please don't let your eyes for a long time looking at strobe light, because the light is very bright, it will make the eyes feel uncomfortable. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, the United States, the Philippines, Taiwan and so on. / Type: EU Plug, it applies to Indonesia, Germany, France, Spain, Italy and so on voltage: AC100-240V size: 16.5 x 10 x 5cm Material: ABS colour: black<br><br>Package Contents: 1 x Strobe Light 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.