Fanvil H3W Wi-Fi Phone with 6 programmable soft keys for service hotline; 2 SIP lines, SIP hotspot; Support audio codec Opus: can handle a variety of audio applications, including IP voice etc; Built-in 2.4G Wi-Fi for IEEE 802.11b/g/n; Dual Network ports, integrated PoE; High Interoperability - Compatible with major platforms: 3CX, Broadsoft, Elastix, Asterisk, Xorcom, etc.