1. Mengadopsi modul nirkabel industri berkinerja tinggi;
   2. Support (WCDMA/CDMA/TD-SCDMA) and 4G (FDD-LTE/TDD-LTE)
   3. Adopt metal shell with protection grade of IP30;
   4. Standard RJ45 (Ethernet) interface built-in lightning protection 3000V (nonstandard configuration needs to be customized);
   5, wide voltage current input: DC7-35V/3A;
   6. Support 2-channel analog input/control output with photoelectric isolation,
   which is applied to vehicle diagnosis and alarm, control vehicle flameout, etc.
   (Non-standard configuration needs to be customized); 7. Software and hardware
   watchdog anti-crash design, after the router is disconnected, it will
   automatically power off and restart to ensure stable and reliable operation of
   the equipment; 8, automatic detection of network disconnection, automatic
   restart of dialing failure, timing restart and other functions;
   9. Serial port transparent transmission function. The command control mode can be
   entered through the serial port to control the router and ancillary equipment;
   10. Support multiple DDNS dynamic domain name services;
   11. Port mapping, DMZ host and other functions;
   12. Support VPN (PPTP Client, L2TP Client);
   13. Optional GNSS positioning module, supporting RTK technology, and supporting multiple satellite
   systems

Sisi A
1. WAN-LAN4: RJ45 interface The WAN can only be used as a WAN port in standard router mode.
2. DC power interface/terminal power supply: 2.1mm round head power interface, positive inside and negative outside, voltage input:
7-35 V. Input power greater than 10 W is recommended.
3. RS232/RS485 serial interface: 4 Pin terminal female Edg 3.5mm.
4. GPIO interface: support 2-channel analog input/control output with hotoelectric isolation (additional customization is required)
Sisi B
1. Indicator light
WiFi light: It is always on after being powered on, and flashes when WiFi is working normally. SYS lamp: it is always on after
power on, and it flashes slowly when the system is started
normally. Flash when the reset key is pressed. LINK light: In 4G or WIFI bridging mode, it flashes when dialing (bridging AP), and it
is always on after successful networking. VPN light: always on when using VPN;
2. R (reset) key: press this key for 5 seconds in the power-on state, the SYS light will flash, and then restart, and the reset is
successful.
3. SIM card slot: snap-in SIM card holder. If you need to take out the SIM card, gently push the SIM card.