Patlite bdv-15jf-k 4-channel mp3 smart alert, user programmable, dark gray, dc12v to dc24v the bdv mp3 smart alert is an industrial mp3 player that can playback mp3 files uploaded by the user with excellent sound quality. The panel mounting style results in a clean, integrated look for almost any application. Programming is easily accomplished withpatlite’s free playlist editor software, that can be downloaded from the website, andpatlite’s sd card (sold separately). features: only embedded mounting style available up to 63 seconds of maximum playback time able to produce a loud sound of up to 87 db (at 1m) despite its compact size a volume control inside the front cover provides an easy way to adjust the sound volume messages can be easily changed without removing the unit by using an sd card environmentally friendly since the unit complies with the eu rohs directives several playback modes are available for various applications includes binary input as a standard option for selecting up to 15 messages supports input selection using npn open-collector transistor the unit complies with eu directives and includes the ce mark (bdv-15jf only) two colors are available for selecting the best color match for the installation protection rating: ip54 (when flush mounted)