Feature:1. BETTER SOUND EFFECT: The PCB adopts 4 layer board structure, which has better performance. Using mature cavity dual diaphragm speakers, the sound effect is better2. MORE SENSITIVE TOUCH: The display is optimized, the touch chip is replaced, and the touch is more sensitive. The power supply is powered by the external TYPE C interface, which can be charged by the TYPE C interface3. WITHOUT STANDBY POWER CONSUMPTION: The battery circuit is optimized, no standby power consumption, the battery is more durable, and the good quality crystal oscillator is selected to improve the performance4. SOFTWARE DEFINED: Improve the charging circuit to solve the problem that the battery cannot be charged and cannot be turned on. The radio is originally built on the SDR, the function is determined by the loaded software5. 50KHZ‑200MHZ: Frequency range from 50kHz to 250MHZ and 400MHz to 2GHz, support all types of analog modulation of AM SSB(LSB USB) NFM WFMHow to Use:Specification:Item Type: DSP SDR Radio ReceiverMaterial: Aluminum alloyReceiving Range: 50k-2GHZBattery: Lithium battery 2500mAhSimple Operation Instructions: 1.HARD (setting): EN1, EN2: The Direction of addition and subtraction of the two encoders is reversed. V bat or power display: S standard, L low voltage. SW Ante or Shortwave Antenna Selection: 50ohm 50ohm Hi z high impedance. ATT Attenuator: The same as the transceiver. LNA or MIX, MIX GR: Do not open the functions that the current machine (including the original version) does not have, otherwise the gain and sensitivity will be greatly reduced! RF GAIN: The same as the transceiver, when it is set at about 20, the sensitivity is the best. PREAMP: Same