Details：
1. After picking up the phone, you can dial 110, 120, 119 and other emergency numbers in the first three seconds. 2. After picking up the phone for three seconds, the phone will automatically dial the bank customer service line; 3. After off-hook for 30 minutes, the phone will automatically hang up. Pick up the phone again and use the phone normally. 4. Dial-free direct-through wall-mounted telephone

Details：
Applicable to banks, securities companies, exhibition halls, tax bureaus, auditoriums, parks, scenic spots for help, people looking for large supermarkets, airports, stations, large dust-free workshops, safe city alarms and other unattended places.

Details：
This phone is compatible with most PABX , mainly used for voice communications in public work environment, and to achieve peer ( single) call in a public communications network or private network ;