I. Function Overview
1. Embedded installation, 304 stainless steel body, corrosion and vandal resistant.
2. Supports connection to telephone PBX or PSTN telephone lines.
3. Hands-free calling, detects busy tone to end call.
4. Built-in speaker, waterproof, dustproof, and antibacterial treatment.
5. IP65 waterproof and dustproof rating, antibacterial structural design, flat and easy to clean.
6. Supports setting automatic answer broadcast for incoming calls, two one-touch direct dialing functions.

II. Operation Guide
1. Power On/Off: Controlled by the hands-free button.
2. Answering Calls: When there is an incoming call, the phone rings. Press the hands-free button to talk or wait for automatic answer.
3. Making Calls: Press the hands-free button to power on, then dial via the keypad. Lightly tap the hands-free button to end the call after conversation.
4. One-Touch Dialing: Press the S1 or S2 button to directly dial preset numbers.

III. Main Technical Parameters
1. Operating Voltage: Supports connection to telephone PBX or PSTN lines with feed voltage of 48V-60V.
2. Temperature: -20℃~65℃ Relative Humidity: 10%~90% Atmospheric Pressure: 86~106 Kpa Ambient Noise: ≤100dB(A) 
3. Speaker: Built-in standard 0.5W speaker, optional 3W (requires mains power supply).
4. Keypad: 12-key full keypad made of 304 stainless steel, characters etched and surface oil-filled.
5. Housing: 304 stainless steel body with integrated laser cutting process, high precision, small physical gap with buttons for better dust resistance.
6. I/O: Supports one dry contact output.

IV. Packaging Dimensions
Unit Dimensions: 250x150x40mm
Master Carton Dimensions: 325*235*165mm
Packaging Material: Carton
Gross Weight: 1.7KG
Net Weight: 1.2KG