This is the Hitec Optic Laser and Eclipse Transmitter Antenna. FEATURES: Fits the following Hitec Transmitters; 4 CH: Laser 6 CH: Laser/Optic 7 CH: Eclipse/Prism INCLUDES: One antenna REQUIRES: Installation onto the radio SPECS: Length: 6-1/8" (155mm) Extended Length: 3 foot 11-1/2" (120cm) JAW 2/28/07 ir/jxs