HB3681B (US TV Mini Version -- one-click Thunder Search) is a TV remote controller produced by Haobo High-tech. It has the function of full-speed automatic search for applicable models and is suitable for most different brands, models, and time-manufactured TV sets in the US market.
The HB3681B is a miniature universal TV remote designed for the North American market. It features a built‑in code library for most TV brands, a compact form factor, and a one‑key “Thunder Search” function that automatically finds the correct TV code.
The manual explains how to activate the one‑key search by holding the Power or Mute button, shows the circuit diagram of the remote, and includes revision history and component details for service technicians. This manual is written in Chinese.
| Minimum operating voltage | 1.8 V |
|---|---|
| Standby current | <0.1 µA |
Turn on the TV, point the remote at it, then hold the Power button for forward search or the Mute button for reverse search until the TV turns off, then release.
No, the remote retains its codes even after power loss, and button presses do not erase stored codes.