Also known as proximity marketing, messages are transmitted through a data transferring system more commonly known now as Bluetooth. Initially created to be used to transmit your cell phone calls to your wireless headset, the technology can now be used to reach a targeted audience through ads that are created with video, text and sound enhancement. It does not require the internet, and is a separate data transferring system that is completely free for the receiver and sender of content.

The ads are permission based, unlike TV and radio, and provides an attractive opportunity to advertisers because of the popularity of the Bluetooth system with the under 30 demographic. Young people are hard to reach as they spend less time watching TV or reading newspapers and magazines in today's digital world. With the ability to share these files with friends at any location once it is saved in their phone – it provides the opportunity for one ad receiver to create many more viewers.

Here's how it works…

When an ad transmitted detects someone has a cell phone with the Bluetooth function turned on (typically within 100 yards of the transmitter) it sends out a message offering the promotional clip. The transmitters are about the same size as a wireless modem. Receivers of the message can accept or decline the ad. Advertisers are encouraged to give away prizes and/or discounts to boost the interest of the ad content. If a cell phone user accepts the ad, they are then able to view a short 15 –20 second video that provides an opportunity to receive information, a discount or a free item. They are asked to save the message to show to the particular vendor or shown a web address to download the coupon.

What Exactly is a 3GP file?

3G stands for third generation, a generic wireless industry term for high-speed mobile data delivery over cellular networks.

3G networks allow users to send and receive bandwidth-intensive information such as video, video conferencing, high quality audio and web data on-demand, virtually anytime and anyplace.3GP is a multimedia container format defined by 3GPP for use on 3G mobile phones. It is a simplified version of MPEG-4 Part 14 (MP4). 3GP files have the filename extension .3gp (GSM Based Phones) or .3g2 (CDMA Based Phones).

3GP stores video streams as MPEG-4 or H.263, and audio streams as AMR-NB or AAC-LC formats. 3GP files are always big-endian. 3GP also describes image sizes and bandwidth, so content is correctly sized for mobile display screens.

3GP files are viewable on a PC using 3GP Player, QuickTime, RealPlayer, MPlayer, VLC Player, Total Video Player, The KMPlayer.

3GPP, 3GPP2 are the new worldwide standard for the creation, delivery and playback of multimedia over 3rd generation, high-speed wireless networks. Defined by the 3rd Generation Partnership Project and 3rd Generation Partnership Project 2 respectively, these standards seek to provide uniform delivery of rich multimedia over newly evolved, broadband mobile networks (3rd generation networks) to the latest multimedia-enabled wireless devices.