Dummy Burglar Alarm Bell Box - Solar Powered Dummy Burglar Alarm Bell Box - Solar Powered. Good Quality waterproof alarm box with built in solar panel. Solar panel charges the re-chargeable batteries which enable the lights to flash day and night. Made from good quality polycarbonate that will not fade. Very convincing security deterrent. Measures: 195 x 200 x 48mm. Requires 3 x AA re-chargeable batteries, fixings and instructions. Easy to install.