We are the manufacturer in Shenzhen,China. the camera is high quantity but low cost:
Technical Details
2.4G Color Wireless Camera with Receiver
Monitor up to 4 different cameras
Portable, Flexible and Easy to Install
Product Description
2.4G wireless color camera and receiver (with remote control) that can provide a variety of solutions for you. You can monitor your sleeping baby, or monitor kids at play, or keep an eye on your warehouse or store, - the applications are unlimited.

Product:
2.4GHz Wireless security camera & recording system, Range up to 400 ft, color
Observe
Listen
Record
USE Every Where
Nurseries
Homes
Office Buildings
Hotels-Motels
Schools
Warehouse
Parking Lots
This Version is Night Vision, can link to your AV or link to the PC through USB, record to your PC's Hard drive via USB connection. Designed for your home safety

Note: Receiver must be connected to your PC to use DVR function

Features:
Transmits color video and audio signals from the camera to your TV, Monitor or PC
4 channel selectable frequency available to avoid interference
built-in microphone
16 IR(infrared) LED for Night Vision capabilities
range up to 400'
Receiver / USB DVR
fast USB 2.0 Data transfer
connect to your T.V.,monitor and / or computer
30 frames/sec recording speed
MPEG-4 compression
remote Monitoring via internet
built-in motion detection
schedule recording
remotely record and store images on your computer hard drive
receiver must be connected to your PC to use DVR functions

surveillance
security systems
security camera
security surveillance
surveillance systems
wireless security
security cameras
hidden camera
surveillance camera
mini camera
video surveillance
wireless video
network camera
spy camera
video security