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Yes it does. A camera wireless camera would not be operable without some source of power to it. This source of power can come from either the AC outlet (using the adapter) or from a battery.
Wireless Security Cameras are a combination of three components: A camera, a transmitter to send the signal, and a receiver to receive the signal. A Wireless Camera transmits video from a built-in transmitter to a receiver, which is in turn plugged into either a monitor or other recording device.
Most cameras operate on a 2.4 GHz frequency, as do cordless phones. There are three other frequencies: 2.4 GHz, 1.2 GHz, 900 MHz, 5.8 GHz, each with their own unique specifications.
2.4 GHz:
A 2.4 GHz Wireless Spy Camera comes equipped with 4 channels. There is no tuning required. We generally recommend 2.4 GHz over 900 MHz because the overall video quality is better. Range varies from 200-700 feet, depending on environmental conditions.
Generally, the worst kind of interference a RF radio signal may encounter is another nearby radio signal operating at or close to its own frequency in the RF spectrum. These 2 (or more) signals then "compete" for use of this frequency. If there is any "winner," it will always be the stronger signal present. For example, a microwave oven is essentially an extremely powerful microwave transmitter tuned to the 2.4 GHz frequency range. Many cordless phones also operate on this frequency and may cause interference, if placed in close proximity to a Wireless Video Camera.
1.2 GHz:
High resolution video transmission and outdoor medium range potential makes 1.2 GHz Wireless Video Systems a good choice for multiple system applications.
1.2 GHz makes a huge difference in the range and quality of video image received, especially when going through ceilings, floors and most walls. In an unobstructed site with no other electrical interference, you can expect to clearly transmit up to 300 feet.
900 MHz:
This is an amateur band. An amateur license is required to operate. 4 channels are available in the 900 band. The signal goes to a dedicated receiver that is tuned from 902-930. 916.5 MHz is the standard transmitter setting; there are 3 other frequencies. Range varies from 200-700 feet or more depending on environmental conditions.
900 MHz receivers have a tuning knob that you must adjust to attain a clear, sharp picture. There is no interference between 900 MHz cordless phones and 900 MHz Wireless Surveillance Cameras.
5.8 GHz:
5.8 GHz is the latest and greatest in CCTV Wireless Security Equipment. Record and view up to 4 channels of video with an operating frequency between 5725 ~ 5825 (4 Channels), with a range of up to 300 ft. with direct line-of-sight.
When using the 5.8 GHz frequency, you are not sharing a radio frequency that is considered to be part of the public band, eliminating interference from other 2.4 GHz devices. Plus, a 2.4 GHz Wireless Video Camera may only transmit a wireless signal up to 500 feet line of site, whereas a 5.8 GHz Wireless Video Camera sends a stronger signal up to 2,000 feet line of site.
