1With 9 LED indicators, signal display, call status display. 2The new slot upgrade, easy to view the contact between the card and the chip, but also conducive to some customers with Cato, easy to insert and remove the phone card. 3With automatic step-down circuit, you can directly use the security alarm system 12V power supply. 4Standard DTMF input recognition and display. In addition to the standard caller ID, standard DTMF input can also be used to effectively avoid errors such as missing numbers. 5Using anti-noise circuit design, anti-noise and anti-jamming. Description: The wireless access fixed station is a wireless fixed voice and data access device that adopts the GSM technology standard. It can use the GSM network to quickly provide fixed wireless telephone communication services and data services within the coverage of the GSM cellular network. Features: With 9 LED indicators, signal display, call status display.The new slot upgrade, easy to view the contact between the card and the chip, but also conducive to some customers with Cato, easy to insert and remove the phone card.With automatic step-down circuit, you can directly use the security alarm system 12V power supply.Standard DTMF input recognition and display. In addition to the standard caller ID, standard DTMF input can also be used to effectively avoid errors such as missing numbers.Using anti-noise circuit design, anti-noise and anti-jamming.24 hours of work, built-in watchdog automatic detection, all-round avoid the occurrence of crashes, to prevent crashes, to avoid missed missed calls.Using industrial wireless communication module, with high-quality signal to enhance the antenna, the signal is relatively strong, clear and stable voice quality.Specifications: Plug: US, UK, EU. (Optional) Weight: 410g Host size: Approx. 16 * 10 * 3cm / 6.2 * 3.9 * 1.1in Antenna length: 280cm Antenna height: 20cm Telephone cable length: 145cm Color: White Working mode:GSM 850/900/1800/1900MHz,2G card can be used, and can be connected to a variety of communication products Peak power: 0.25W / 0.5W Power consumption: Static 25mA , emission 300 mA Sensitivity: -104 dB Internal voltage: DC 5C / 12V / 1.0 A Ambient temperature: -10 C to +40 C Operating Humidity: 45%~90% Atmospheric pressure: 86 to 106 Pka Ambient noise: