Details：
Handset mode, ordinary phone usage; RJ11 interface, built-in power adapter, AC220V power supply; when the called ring, the loudspeaker rang; supports 3 sets of speed dial keys, one-touch dialing can be achieved after the handset is lifted

Details：
Ordinary dialing function, hands-free mode; support check busy tone, automatic hang-up function; 3 groups of blank keys on the right and the lower left button can pre-store numbers to realize one-key speed dialing; compatible with various program-controlled switches, and support the switch’s multicast function

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：
The phone needs to have a built-in mobile phone card (with data and call charges) or an Internet of Things card to use. If you use a telecom 4G card, you need to activate the high-definition voice call function; you can set free rates and packages; real-time display of phone status; card issuance, card replacement, loss report, recharge; support WeChat terminal; support mobile app; query call records, etc. Function.

Details：
The casing of the telephone is made of high-strength stainless steel SUS304 material, and the surface is brushed (painted), which has strong wear resistance and corrosion resistance. The shell has a grounding device and is completely electrically isolated from the internal circuit, has a certain electromagnetic shielding effect, and has the characteristics of dustproof, anti-noise and anti-riot.

Details：
304 stainless steel shell, this phone has the features of one-key automatic alarm, one-key cyclic dialing, one-key automatic intercom and so on. It is an essential communication device for emergency help in elevators, and it is also a convenient communication device for clean room intercom.