Electrical Parameters:  - Use a 3.6v lithium battery  - Support USB charging  - o output supports headset 3.5MM  - Support 8-ohm speaker 1W output  - FM supports earphone antenna  - Antenna interface uses BNC  - The PCB retains the SI4735 package, users can replace the chip by themselves, and the software is compatible  Features of This Sketch:  1) FM, AM (MW and SW) and SSB (LSB and USB);  2) o bandwidth filter 0.5, 1, 1.2, 2.2, 3 and 4Khz;  3) 22 commercial and ham radio bands pre-configured;  4) BFO Control;  5) Frequency step switch (1, 5 and 10KHz).  Attention:  - If you modify the parameters, please refer to the actual product.  Package Included:  - 1 x Set of Radio Receiver  Note: - It is assembled and ready to use.