[One Push to Talk] This smart audio receiver is equipped with Portapack's 3.5mm audio jack, which makes it also available as a standard configuration. Voice intercom radio call. [Frequency Range] The frequency range of the software-defined radio receiver is 1MHz6GHz. There is a micro-memory card slot for data and code storage, which is very practical and convenient. [Precise Tuning] This USB SDR radio transceiver adopts PPM calibration, which can achieve more precise tuning and stable performance, very easy to use, you can use it with confidence. [Easy to Use] Easy to connect and install. Press the black knob once to power on, press the black knob twice to power off. 1. R9 version for one + H2 R4 version portapack h2 2. Flash the latest version of firmware to Portapack H2 (the latest version of releases firmware, and the firmware update progress is consistent with the official one) + for ONE 1MHz to 6GHz SDR + 0.1ppm TXCO 3. The only hardware in the world developed in cooperation with the author Our machines support the author's official firmware and updates to the greatest extent possible NOTE: The firmware required by portapack has been flashed to for V1.7.3. Every piece is tested before shipping. You can use it directly and start the device with just one press of the knob button. Colour:B:Black Material:Metal Package Contents: 1 x host 1 x antenna 1 x data cable 1 x Touch pen 1 x machine foot pad 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.