Use a 3.7v lithium battery. Support USB charging and downloading. output supports headset 3.5mm.Support 4ohm speaker 3W output.FM supports earphone antenna. Integrated NANO into one,Charging and data integration into an integrated interface,Increase signal sensitivity by 2-3dB compared to the old one,Increase shielding cover to reduce interference in the receiving part,Add ADC battery voltage acquisition circuit. new and high quality,Antenna interface uses BNC.Si4732 and si4735 are compatible. Users can change the chip by themselves, and the software is compatible. FM,AM (MW and SW) and SSB (LSB and USB); bandwidth filter 1,1.8,2,2.5,3,4,6kHz; 22 commercial and ham radio bands preconfigured; BFO Control; Frequency step switch (1,5 and 10KHz); Band band[]= {FM_BAND_TYPE, 8400, 10800, 10430, 10}, {LW_BAND_TYPE, 100, 510, 300, 1}, {MW_BAND_TYPE, 520, 1720, 810, 10}, {SW_BAND_TYPE, 1720, 3500, 1900, 1}, // 160 meters {SW_BAND_TYPE, 3500, 4500, 3700, 1}, // 80 meters {SW_BAND_TYPE, 4500, 5500, 4850, 5}, {SW_BAND_TYPE, 5500, 6300, 6000, 5}, {SW_BAND_TYPE, 6300, 7800, 7050, 5}, // 40 meters {SW_BAND_TYPE, 7800, 10000, 9600, 5}, {SW_BAND_TYPE, 10000, 11000, 10100, 1}, // 30 meters {SW_BAND_TYPE, 11000, 12500, 11940, 5}, {SW_BAND_TYPE, 12500, 13900, 13600, 5}, {SW_BAND_TYPE, 13900, 14500, 14270, 1}, // 20 meters {SW_BAND_TYPE, 14500, 15900, 15300, 5}, {SW_BAND_TYPE, 15900, 17900, 17600, 5}, {SW_BAND_TYPE, 17900, 18300, 18100, 1}, // 17 meters {SW_BAND_TYPE, 18300, 21900, 21200, 1}, // 15 mters {SW_BAND_TYPE, 21900, 26200, 24940, 1}, // 12 meters {SW_BAND_TYPE, 26200, 27900, 27500, 1}, // CB band (11 meters) {SW_BAND_TYPE, 27900, 30000, 28400, 1}}; // 10 meters Colour:Black Material:plastic Package Contents: 1 x Radio Receiver 1 x Antenna 1 x Type-C Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.