Feature:1. TWO TYPES OF OUTPUTS: Full band sound receiver include digital output or analog output two modes, digital output through the class D power amp drive output, analog output through the analog op amp drive output, in different modes, support different functions2. SUPPORTED BANDS: Full band sound receiver analog output mode support AM(medium wave MW or short wave SW) aviation band, SSB(LSB lower band or USB upper band)3. SOLDERING FREE: The sound receiver kit is designed to be beginner friendly as no welding is required. The module is pre welded, so you only need to assemble the battery, antenna, speakers, buttons, and housing to complete the project4. FOR BEGINNERS: If you love the assembly project and are new to electronics, this sound receiver kit is an ideal starting point. You will gain the satisfaction of creation and understand the various components involved in a simple receiver5. UHF EXPANSION: Full band sound receiver amp support for UHF band reception or transmission through the expansion board, suitable for adults and school studentsSpecification:Item Type: Full Band Sound ReceiverMaterial: PCBHost Battery: 1 x Polymer battery(not include)High Resistance Amp Battery: 1 x Polymer Battery, Battery Capacity: 800mAh (high resistance amp with built in battery)All Band Sound Receiver: Frequency Modulation: 64Mhz-108MHzAM Medium Wave MW: 520KHz-1710KHzAM Short Wave SW: 3.5MHz-30MHzAmplitude Modulated SSB: 3.5MHz-30MHz(BFO adjustment 0-2000Hz)Aviation Band: 118MHz-137MHzUHF Expansion: Support for UHF band reception or transmission through the expansion board.Package List:1 x Motherboard1 x Screen1 x Antenna1 x Speaker1 x Volume Knob1 x Wrench1 x Nut1 x Washer1 x Adhesive Tape1 x Red Cover1 x Blue Cover1 x Yellow Cover20 x Screws4 x M2x22 Nuts4 x M2x11 Nuts2 x M2x3 Nuts4 x M2x5+3 Screws6 x Case Frames1 x Short Wave Antenna1 x Medium Wave Antenna1 x High Impedance Amp1 x Storage Box