Sold by Unitree Robotics’s own shop
Unitree Robotics Unitree IM6014 Motor — UART to RS-485 Module

Photo © Unitree Robotics, from the shop’s page

Unitree IM6014 Motor — UART to RS-485 Module

$15

Buy it on shop.unitree.com

Sold by Unitree Robotics’s own shop, not by droid.monster. The price and stock here are what the shop’s own site listed when we last read it, on 06/10/2026; its page is the one that counts.