Each LED module contains 3 LEDs. The package contains 10 modules (total of 30 LEDs) with adhesive tape at the back, screws for solid installation, and 2.1x2.5mm. male and 2.5x2.5mm. female jacks at the end for easy scaling. It's assembled as a sting 4.2ft (129cm) from end to end. Ready to use. No need for soldering. Light output per module is 100 Lumen. These LED light modules can be used with dimmers and other on-off switches. One module needs 1.1W power, you can power this LED module string with a 12V 12W DC or stronger power supply. Every 3 LED module is cuttable from the cable without damaging the rest of the strip. This SMD LED string is IP67 waterproof. 2835 chip module with a 160-degree lens to increase luminous intensity. High quality, super-bright, energy-saving and environmentally friendly, high brightness, low heat generating, no UV or IR light radiation, impact resistance, Long lifespan 50,000+ hours. Ideal for decorative and billboard back lighting. Suitable for indoor and outdoor use. It can be used in advertisement illumination like letter signs and backlight for billboards. You can use these LED module strip lights for DIY home, garden or party decoration, to illuminate your closet or drawer, to create authentic scenery on the kitchen counter, under the table, or bed. You can turn a standard make-up mirror like Hollywood style vanity make-up setup.