Feature:1. The Kit Uses A BandPass Filter, 3355 HighAmplifier, Ne602 Mixing, Mc1350 MidAmplifier Solution, Which Can Receive Am Signals Of 118-136Mhz.2. Directly Printing Inductor Traces On The Pcb Board Greatly Simplifies The Difficulty Of Assembly.3. The Agc Circuit On The Board Ensures Comfortable Listening, While The Squelch Function Avoids LongTerm Noise.4. 12V Power Supply, 9.2 X 7.5Cm Pcb Board Size, Which Can Be Directly Used In 97 X 40 X 75Mm Aluminum Chassis5. It Is Specially Used To Receive The Call Between The Aircraft And The Tower. With The Antenna With Good Performance (Vhf Band Yagi Antenna), The Open Area Can Receive Various Types Of Aircraft And Tower Calls Within About 190Km. Please Pay Attention To Your Favorite Friends.Specification:Item Type: Aeronautical ReceptorPcb Board Size: Approx. 9.2 X 7.5Cm / 3.62 X 2.95InTip: Because The Vhf Band Is Already Similar To Light PropagationLinear Propagation, The Receiving Location Is Unobstructed From The Airport, But The Distance Is Longer (More Than 25Km). Be Sure To Install A High Gain Antenna Such As The Vhf Band YagiUda Antenna; If There Are Large Obstacles Between The Receiving Location And The Airport(Including But Not Limited To Tall Buildings, Mountains, Towers), Be Sure To Bypass The Obstacles, Thank You!Kit Description:This Kit Is Not Soldered Well, And The Delivery Is All Scattered Electronic Components. The Picture Of The Finished Board Displayed In This Shop Is For Reference Only When Purchasing.Package List:1 X Aeronautical Receptor1 Pack X Resistance1 Pack X Capacitor1 Pack X Knob Potentiometer1 X English Manual