Frequency range: WiFi : 2.4 GHz, 5 GHz, LTE / GSM : 699 ... 868 MHz, 1850 ... 2690 MHz ; Antenna type: 2 x Omnidirectional antenna Wi-Fi, 2 x Omnidirectional antenna 4G LTE ; Standards: 2.4 GHz Wi-Fi : IEEE 802.11 b/g/n, 5 GHz Wi-Fi : IEEE 802.11 a/n/ac, LTE Cat. 6, 3G WCDMA ; SIM card slot: 2 x Mini SIM – 2FF ; Port USB: USB 2.0 ; Main features: , Support for VoIP technology, Support for IoT (Internet of Things) systems, 2 x 4-pin industrial power socket, Wide range of supported supply voltages, Redundant power supply, Can be mounted in a Rack 19" cabinet ;