Brand NEW! This is a solar security light with motion sensor and alarm. Measures about 5" x 4".   The solar panel recharges a built-in battery during the daytime using sunlight, so you don't need to install batteries or have an external power source.  The unit has a motion detector which turns on once it senses motion within its field of operation. It has one panel that illuminates red and the other panel illuminates blue which flash when the motion sensor is triggered.  You can set it for alternating flashing (like police car lights), or staccato flashing, or steady color flashing.  There is also an audio siren that you can select to turn on when the lights start flashing, or you can set it to silent mode without the sound.  The siren alarm is not too loud (won't wake up the neighbors) but is enough so if you are inside the home or nearby, you can hear that it was triggered, but mostly it's a warning siren to whoever is nearby that the area is being monitored.  Great item for placement along the side of the house, outside your shed or areas where you want to have a little piece of mind and give a warning to people passing by the unit.