LED Music Spectrum Electronic DIY LED Flash Kit Operating voltage: 5V USB power supply. Signal access mode: 3.5 audio line input audio signal. Installation: DIY welding assembly. Dimensions: 108 x 70 x 16mm (Length x high x thickness). Weight: 130g (including housing) 67g (excluding housing). Type: With housing DIY kit/ Without housing DIY kit (Need to select, two types are different prices.). PCB color: White. Package included: 1 x Electronic DIY LED Flash Kit With housing.