External Probe: 2 Micro USB, supports DS18B20 temperature probe (optional extra) On-board Memory: 300,000 sensing records Network: Supports WiFi, GP / 3G / 4G * WiFi Channel Width: Supports 20MHz or "Auto" setting WiFi Security: Supports OPEN, WEP, or WPA/WPA2 types, WPA2-Enterprise (802.1x/RADIUS authentication) network is not …