Functions:
Land line connection (GSM optional)
Dual and single talk mode switch freely
Two-way talk and emergency panic button for help
System with a speaker and a button that can press to talk, instead of having to pick up the phone
Special picture designed button that makes the user easy to remember and operate
Get through emergency calling in priority
Wired and wireless remote call for help
Telephone line get through and breakup situation check
Built-in battery low-power report
Host can be forcing set in arm situation, it works when power is on