SMAKN&reg; Waterproof Superbright 50cm Red SMD Led Strip Light Lamp with USB Cable Port 5V LED strip is 0.5M , 30 pcs,3528 leds ,very bright. Driven by any devices with output 5V USB port,Such as you Computer /Desktop /laptop/Tablet/Tab/ Car Cigar lighter....... Can be used any devices with 5V USB. Also can be used by your phone charger/adpater(5V). Waterproof flexible LED strip.