Securityman DigiminiAir Digital Wireless Mini Indoor Camera Kit with Audio (Black) Do-it-yourself (D.I.Y) easy to setup and use digital wireless camera kit Wireless transmission up to 200ft between walls and up to 350ft in clear line of sight Built-in microphone for audible recording up to 20ft away Digital wireless pairing between camera and receiver, worry free of signal interception by neighbors Video signal loss alert notification