Seems to work fine. I got it secondhand to use for a project, but don't know much about it, and now I'm moving.
Missing battery cover (easy to solve with some tape).
Info from Google:
The Spektrum DX6i is a popular 6-channel, full-range 2.4GHz radio transmitter used for controlling radio-controlled (RC) airplanes and helicopters.
Key Features
Channels: 6-channel control.
Frequency/Technology: Operates on 2.4GHz using DSM2 or DSMX technology (depending on the specific production version).
Model Memory: Stores up to 10 different model profiles.
Interface: Features a large LCD display and a rolling selector wheel for easy menu navigation.
Programming: Supports airplane configurations (flaps, delta, V-tail) and helicopter configurations (gyro adjust, throttle and pitch curves).
Power: Runs on just 4 AA batteries rather than heavy multi-cell packs.