1.wireless hidden camera
2. CMOS sensor
3. Loudspeaker shape
4. with audio
5. built-in microphone

Wireless hidden camera ELP-WC506D  

1. 2.4G Wireless  camera and receiver
2. CMOS sensor, 380TV line
3. Built-in microphone for audio monitoring
4. Long operation range: up to 100 m line of sight or 30 m through obstructions (walls/ceilings)
5. The camera build in in the clock for not be easy found