Patlite bsv-24p-d mp3 smart alert, 15 built-in & user programmable, dark gray, dc12v to dc24v the new, slim-designed bsv mp3 smart alert is an industrial mp3 player that can playback mp3 files uploaded by the user with excellent sound quality. The compact size allows panel mounting for even tight-fitting panels. Programming is easily accomplished withpatlite’s free playlist editor software, that can be downloaded from the website, andpatlite’s sd card (sold separately). features: thin design – only 19.9mm deep fits in very tight spaces easy installation – self-locking mechanism allows the unit to be installed by one person easy volume adjustment with the rotating front cover 87 db at 1 meter despite its small size messages can be easily changed with mp3 files and an sd card (sold separately) up to 63 seconds recording time (@64 kbit/sec) up to 15 playback channels (binary input) extended playback option available