Feature: 1. [3.5MM JACK] With a 3.5mm audio jack, this radio transceiver allows easy listening to standard NFM and WFM audio signals by simply connecting a speaker. 2. [MORE FUNCTION] The 3.5mm audio jack also enables the radio transceiver to function as a standard push to talk or voice controlled intercom. Simply plug in a microphone and press the right side button to call. 3. [SIGNAL CATCH AND REPLAY] This radio transceiver can effortlessly catch and replay wireless signals from remote control operating in the ISM frequency band. 4. [AUDIO RECEPTION] Capable of receiving SSB, AM, narrowband FM, and wideband FM audio, this radio transceiver features a spectrum waterfall display for a comprehensive audio experience. 5. [PORTABLE EXPLORATION] By adding a USB battery, you can explore the radio spectrum anytime and anywhere. The firmware can be used with a fast ARM processor, no need for a computer (excluding firmware reprogramming). Specification: Item Type: SDR Radio Transceiver Material: Aluminum Alloy Battery Type: 3.7V 2000mAh lithium battery x 1 (Built in) Antenna Receiving Frequency Range: 1MHz-6GHz Catch Replay: One of the best things about this radio transceiver is that it makes it very easy to catch and replay wireless signals from ISM band remotes. Create a catch. All you need to do is go to the Catching menu, set the frequency of the remote control key, press the red R record button and press the key on the remote control. Then stop recording to save it to the storage card. Now you can go to the Playback menu, select the file you just recorded and click Play. The exact same signal will be transmitted over the air, effectively replacing your remote key. TX Microphone: Using the 3.5mm radio jack, the radio transceiver can also be used as a standard push to talk or voice controlled intercom. Plug the microphone into the radio jack, simply press and hold the right button to push to talk. If desired, you can also enable multiple CTCSS tone options, as well as tones that appear to be transmitted to the wireless headset Receiver: You can easily listen to standard NFM and WFM radio signals by connecting your speaker to the 3.5mm radio jack. ADS B reception is easily enabled on the radio transceiver by selecting the inductor and lightning symbol in the upper right corner. Hardware Configuration: 3.2 Inch LCD, 240 x 320 RGB LCD, with resistive touch screen Navigation switch Radio output Microphone input DC 2.