Features: Suitable for Christmas trees, holiday lighting decorations, birthday parties, etc It can be controlled by remote control, Bluetoothcompatible control, and the light modes can be controlled by switches on the USBinterface USB 5V2A power supply, 2meters 20 lights, 3meters 30 lights, 5meters 50 lights, 10meters 100 lights, 15meters 150 lights, 20meters 200 lights IP65 waterproof, RGB illusion lighting, 210 lighting modes, voice control modes, music modes, 30-120minute timed shutdown function Can be used for indoor and outdoor decorations, bedrooms, dormitories, railings, windows, and Christmas trees , curtains, galleries, tents, patios, entrances, parties, porches, courtyards, decks, they can enjoy the perfect setting to add a sense of romanticambiance. Specifications: Item: USB Bluetoothcompatible Music LED Light String Length：approx 2M/6.56ft 3M/9.84ft 5M/16.4ft 10M/32.8ft 15M/49.2ft 20M/65.6ft with : 40Keys Remote Control Package Includes: 1 Set LED Light String note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.