This is the Tactic 2.4GHz SLT 4-Channel Mini Transmitter.
The Tactic TTX403 Transmitter gives you more versatility than you might expect from one that’s this compact. The TTX403 is ideal for flying all Great Planes and Flyzone micro aircraft, as well as airplanes such as those in the AirCore modular aircraft lineup.
That’s in addition to exclusive Secure Link Technology. Once the link has been established, it is unbreakable and virtually eliminates outside interference.
One Tactic 2.4GHz SLT 4-Channel Mini Transmitter with 5 AA alkaline batteries