Why choose products? Because we provide the best after-sales service team. 1: what if you can't apply for a refund after the 30-day return period? Please contact us directly to get a refund or reissue a brand new product. Your positive feedback is the most important to us. 2.if you receive a product that was damaged or lack of parts due to the transporation or other reason? pleas contact us directly and do not need to send back, we will full refund to you or reissue a new one until you are satisfied. Listen carefully as I tell you the difference between each model. 【2811RGBIC】WS2811 RGBIC LED. Each pixel can have its own color and brightness. You can control them individually and set them to any color or animation you want. 【5050RGB】5050RGB has all colors, you can DIY the color you want, but you can't set a color for each lamp bead separately like 2811. 【2835RGB】2835RGB can only display three colors of red, green, and blue alone, and other colors are mixed from RGB, and there is no white. 【2811RGBIC Full Set includes】: power adapter, Led strip light ,mobile phone APP control function + MIC recognition function + DAY color function + 2811IC dedicated APP, built-in 1000 programming modes 【2835 IR Full Set includes】: Power Adapter, Led strip light, 24Key IR Remote Control, Free Gift 【2835 IR+APP Full Set includes】: power adapter, Led strip light, 44Key infrared remote control + mobile phone APP control function + MIC recognition function + DAY color function + free gift 【5050 IR Full Set includes】: Power Adapter, Led strip light, 44Key IR Remote Control + Free Gift 【5050 IR+APP Full Set includes】: power adapter, Led strip light, 44Key infrared remote control + mobile phone APP control function + MIC recognition function + DAY color function + free gift 【IR Full Set VS APP+IR Full Set】 IR: Infrared Remote Control APP+IR: infrared remote control + mobile phone APP remote control + MIC voice recognition function + timing opening 【FULL CONTROL VIA TOP MOBILE APP WITH 60K REVIEWS】 Turn on the LED strip, connect via Bluetooth , adjust and select changing RGB colors, brightness and backlight modes directly from your smartphone using a special application from anywhere in the house. A timer function allows you to make the necessary settings in advance and enjoy smart lighting effects. 【WATERPROOF & EXTRA STRONG ADHESIVE 3M TAPE】 Are you tired of using RGB LED strips that won’t stay in place? We solved that problem! Our strips are equipped with a modern adhesive surface. It is designed to firmly adhere to high, medium, and lower surface energy plastic and paint, metal, and glass.