• VHF Radio, powered by 11 – 33 volts and has an output of 6 watts
• Can be set at 25 kHz and 8.33 kHz
• Receiver - Class C, Class E / Transmitter - Class 4, Class 6
• 6 Watt power output
• Compact and light weight
• Take up minimal space and weight
• Dual watch and two place intercom
• Operation is simple, rapid frequency selection
• Nine programmable memories
• Can be battery operated
• Full certified
• Compliment Trig's TT21 and TT22 Mode S Transponders
• Control head and separate radio hardware unit, can be purchased together or separate  (see part number chart below)
• Flexible installation options due to 2 piece design
• Can be mounted in a standard 2 1/4" hole or even smaller compact mount
• Once fitted, the depth of the radio control head is less than 1 1/2" deep
• Includes built in speaker amplifier, allowing headset free operation option
• Crisp display, visible in all lighting conditions
• TY91 is a lower powered model, ideal for light sport, ultra light, glider and balloon pilots and majority of GA users (See TY92 for a higher powered option)

Additional Information: View Trig TY91 / Becker AR 4201 Comparison Click Here to download the TY91 Installation Manual