FS-GT2 2.4Ghz 2 channels RC remote controller transmitter with GR3E receiver. Fits for rc car/boat/tank receiver accessories. Adopts AFHDS (Automatic Frequency Hopping Digital System),high reception sensitivity. Super active and passive anti-jamming capabilities, very low power consumption. Protection functions when ESC braking, failing and out of control, provides a safe driving experience. Specification: Channels:2 Channels; Model type:car/boat; RF range:2.4-2.48GHz; Bandwidth:500Hz; Band:140; RF power:less than 20DB; 2.4G system:AFHDS; Code type:GFSK; Senditivity:1024; Low voltage warning:yes(less than 9V) DSC port: yes(3.5mm:output:PPM) ST range:90; TH range:45(F:30;B:15); Charger port:yes; Power:12V DC(1.5AA*8); Display: LED Indicator Size:159x99x15mm/6.26x3.90x0.60inch. Package Includes: 1 Piece FS-GT2 2.4GHz Pistol Transmitter 1 Piece FS-GR3E 2.4GHz 3CH Receiver Note: Please allow 1-3cm (0.4-1.18") difference due to manual measurement. Thank you for your understanding.