This is a specification for LCD module, it contains the model, size, interface signals, electrical characteristics, supply voltage, temperature range, etc.
The BT 21605VSS-STF-06-LED01 HK is a 16‑character (5×8 dots) × 2‑line STN positive yellow transflective dot‑matrix LCD module with a 6 o’clock viewing angle and a green‑yellow LED backlight. It uses a Samsung KS0070BP‑00CC LCD controller or equivalent.
Key characteristics include outline dimensions of 84 mm × 44 mm × 14 mm, an effective viewing area of 61 mm × 15.8 mm, and a power‑supply range of –0.3 V to +7 V for logic and –0.3 V to +15 V for the LCD driver. The module operates from 0 °C to +50 °C (storage –10 °C to +60 °C) and provides a 16‑pin interface for data, control, and LED backlight connections.