Catching and Replay: One of the best things about the is PortaPack that it makes catching and replay of wireless signals like those from ISM band remote controls extremely easy. To create a catching. You just need to enter the "Catching" menu, set the frequency of the remote key, press the red 'R' Record button and then press the key on the remote. Then stop the recording to save it to a SD Card. Now you can go into the Replay menu, select the file that you just recorded and hit play. The exact same signal will be transmitted over the air, effectively replacing your remote key. Microphone TX: Using the 3.5mm audio jack the Portapack can also be used as a standard Push to Talk or voice activated walkie talkie radio. With a microphone plugged into the audio jack simply hold down the right button to push to talk. If required you can also enable multiple CTCSS tone options, as well as tones that look like they enable transmission to wireless headphones Other Transmitters: There are generic OOK transmitter which can be programmed with custom data. This mode might be useful for experimenting with simple key fobs, or things like home, automation switches. There are numerous transmit modes implemented that are questionable in most countries and could get you into huge trouble. These transmitters are purely to be used for internal testing with a faraday cage Material:Metal + plastic colour:Black Package Contents: 1 x SRD Radio set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.