New Interphone add   Iron shield and New Mainboard     

This speaker is a passive speaker and has no amplifier function. Please confirm if your camera supports audio output with amplifier before purchasing.

Features:Plug & PlayExtremely SensitiveGreat for Security MonitoringHigher S/N RatioRange :15 Square metresSensitivity:200mA/ubar

Frequency:200-6000HZ

Pronunciation membrane: rubber
Speaker: waterproof.
Speaker size: 50mm in diameter.
impedance:4 OHM
Voice coil: 16 core
Magnet: single magnetic
Power: 3W

Pack : 1* Speaker