Zyxel USG Flex 500. Firewall throughput: 2.3 Gbit/s, VPN throughput: 0.81 Gbit/s. Heat dissipation: 82.23 BTU/h, Noise level: 41.5 dB, Mean time between failures (MTBF): 529688 h. Security algorithms: IPSEC, SSL/TLS, VPN support: IKEv2, IPSec, SSL, L2TP/IPSec. Form factor: 1U. Input current: 4.17 A, Power consumption (max): 24.1 W