Additional Digital 2.4 GHz wireless color video camera with mic, and night vision for Interference-free HS-MS240D Multi-camera System KEY FEATURES: - Built-in microphone transmits sound from camera to the monitor - Wall-mounted or tabletop options - 8 Infra-red LEDs for night-vision - 6-10 feet range - Noise-filtering microphone - Manually swivel camera up/down and left/right - Supply power using A/C adapter, computer's USB port or Built-in 3.7 V Li-ion battery INCLUDED IN THE PACKAGE: - Camera w/ built-in battery - A/C Adapter - 110V-220V - Camera Stand/Wall Mount - User Manual