This manual covers the installation of the HT‑B702L telephone, including wiring, battery insertion, and placement guidelines. It also explains the basic operation of the handset, volume control, brightness adjustment, and special functions such as flash‑cut, long‑control lock, and calculator mode.
Additional sections describe troubleshooting steps, how to reset the device after a fault, and detailed specifications of the phone’s audio and signaling performance. Safety precautions and service contact information are also provided. This manual is written in Chinese.
| Rated voltage | 3 V |
|---|---|
| Weight | 600 g |
| Dimensions (L×W×H) | 210 mm × 210 mm × 60 mm |
| DTMF frequency tolerance | ±1.5 % |
Lift the handset, then press the flash‑cut/setting key once; the phone will automatically hang up the current call.
Enter the main menu, press the number 7 key, and use the up/down keys to set the desired brightness level.