The T3 runs on a 1S Lipo for both Tx and Rx, it's 900 Mhz so no license required. The Tx was easy to recharge because I designed to easily swap from rocket to rocket. I put the receiver in a small project box with a DPDT switch so I could turn the receiver on and off, and when it was off, a wire with a connector stuck out and I could charge the battery without having to open the box (no tools required) since it was a 1S LiPo and doesn't need the balance plug for recharge like +2S LiPos do. This was big for me since I find having to open av-bays, etc. just to charge batteries super annoying.
It also worked really well with Bluetooth to Rocket Locator on my Android phone. Since we have cell service at the launch site, it uses Google satellite maps for a really nice overhead view of the rocket's track, where it is in real time on the way down so you could spot it again much easier, where it landed, where you are, and what's in between. It was really nice to know where it was in relation to the creeks, woods, lone trees, fence lines, cow pastures, beaver ponds, dirt roads, etc.
A feature I liked about the Rocket Locator app was because I would turn the GPS on and leave the receiver and phone on the truck bed when I took the rocket to the RSO and pads. When I got back, I could look at the track of where I walked the rocket to verify the GPS was working well. No track, and no launch.