Feature: 1. Strictly abiding by the design rules of high‑frequency electronic circuits in PCB design, the SDR receiver has an independent power layer. 2. With impedance matching and low static background noise, the product can effectively shield self‑interference. 3. With ultra‑wide viewing angle IPS LCD capacitive touch screen, the viewing angle is not less than 155 degrees. With bright color and clear UI, the side is not white and the screen is not dark. 4. The sound cavity speaker with customized bass diaphragm is used inside the machine, with clear midrange, heavy bass and excellent sound quality. 5. Made of high quality material, the product is durable and stable with long service life. Specification: Item Type: SDR Receiver Material: ABS Frequency Range: 200MHz, 400kHZ-2GHz Demodulation Mode: AM, SSB, WFM, CW Working Current: 300mA Sensitivity: 0.3u (at 200MHz) 3.5 Inch SP Touch Screen Dynamic Blocking Range: About 85dB​ ​ Screen Display Bandwidth: 60kHz Scalable Power Supply Mode: Built-in Battery Power Supply and USB Power Supply Motherboard: Four-Layer PCB Process Antenna: SMA Type Antenna Socket Screen Backlight: Controllable UHF UHF Band Support Battery Model: Lithium Battery Battery Capacity: 600mA. Package List: 1 x Receiver1 x USB Cable2 x Connector1 x Antenna1 x User Manual Note: 1. Please do not overcharge, which will affect the battery life2. Please do not use over frequency3. Please do not knock the product, it will cause the product to be damaged and cannot be used