1、SUPERIOR PERFORMANCE: Potentiometer with switch and regeneration adjustment. The Red Lamp Model 753 is a small seven transistor medium band super aberrant radio. 2、VOLTAGE AND CURRENT: Lamp low block lights red LED 2.4V power supply, current limiting resistor 150 ohms. led current 16mA. 3、PARAMETERS: Filament 2.4V power supply is 7 pin positive, 1 pin negative, 5 pin null. Filament current 30mA. with kit instructions, easy to install. 4、CAUTIONS: Transformer impedance conversion can be used to listen with low resistance 8‑32 ohm headphones. Any transformer can not be used to listen to 2000‑4000 ohm high resistance headphones. 5、PREMIUM MATERIAL: DIY radio soldering kit adopts premium PCB material, durable, heat resisting, stable performance and long service life. Item Type: DIY Radio Soldering Kit Material: PCB Frequency Range: 535-1605kHz Sensitivity<1mV/m Selectivity>14dB OutputPower: Rated 100mW Speaker: 8W Battery Specification: 2xAA Batteries (Not Included) 1 x Radio Kit 1 x Screw Package 1 x Instruction Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. YJL official store