I just ordered one yesterday for Zello / the Network Radios group channels. I realized a bit after ordering it (Amazon), that it comes only with a power cord. You have to attach your own 12 to 24v AC to DC wall adapter, or lighter plug, or have a power supply unit already. That's rather a little annoying. But hoping it works well once I can locate an AC to DC adapter. 73 de WV1SWL (shortwave & amateur listener).
exit zello, hold the square down and swipe zello to the right. You might have to do that a few times. Also click on options then select "push to talk buttons" then select "hardware button" and UNCHECK the "handle button in the background when possible" on zello