Comes with a built in microphone. Has CPLD code so the reboot button doesn't freeze the device unlike some of the other H2's on the market. PortaPack H2M adds a 10.00MHZ TCXO FOX 5070 crystal oscillator to the 2nd generation H2 Support GPS simulation Support the latest official firmware upgrade Note: This is just an expansion board without wireless receiving function. It needs to be installed together with for HACKRF. Screen is upgraded to 3.2-inch wide-angle screen, and perfectly supports touch control. Upgraded battery socket and equipped with a more suitable battery standard (The built-in lithium battery is 2000mAH). It fits perfectly into the for Hackrf. It also supports USB charging and charging status LED display. And it supports the use of button to turn on and off, which is the key to offline use. Upgraded crystal oscillator is 10.00MHZ TCXO FOX 5070 crystal oscillator. High-precision active crystal oscillator with stronger anti-interference. At the same time, it supports GPS simulation (no need to connect to computer software). Combining the feedback of the first generation of key feel issues, the buttons are upgraded to have better feel, and are equipped with keycaps, which are easier to match with your own designed shell. Different batches may have different appearance, which does not affect use. Colour:Black Material:PCB+electronic components Package Contents: 1 x PortaPack H2M Expansion board 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.