There are four main improvements in the V2 version 1.Connecting pins 1 and 16 of si4732 to pins 3 and 4 of BK1080 can increase volume 2.Equipped with 0.2MM tinned copper wire for users, making modification easier 3.The use of FPC reduces the thickness of the module 4.Modified the circuit of the SI4732 PIN section For UV-K5 SI4732 modification module, PCB module containing SI4732 chip, SMT capacitor crystal oscillator Download address for modification software http://.hamskey.com/2024/02/introduction-to-uv-k5-hf-fullband.html?fbclid=IwAR2gckcGuNyP24EpiLzH9T8iw62CcOekuMXC2RWrMBorEdlvGOr-JU_1-JE Modified receiving video link : https://..com/watch?v=cis4kKqoFDA https://.be/jxwBlp8HfKU Different batches may have different appearance, which does not affect use. Colour:orange Material:PCB Package Contents: 1 x modification module V2 1 x 0.2MM tinned copper wire 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.