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The model WP04 Wi-Fi phone is a smart type design that supports 802.11b/g, SIP, G.711a/u-law, G.729a/b, UDP, RTP, DHCP and TFTP etc. • 802.11b/g, IEEE 802.1x, 802.11i • WEP (64, 128 bit encryption)/ WPA /WPA2 /MD5 Auth • Direct IP call without SIP registration • Up to 4 SIP profiles possible • Dial registered number via SIP server • Dial URL from phone book / speed dial • Three-way calling / Call waiting • Call reject/ Redial/ Mute • Caller ID /Anonymous call • Message waiting indicator • 5 way navigation paddle • Keyboard backlight • Vibrator switch • Key lock • Hands free • Volume control • Phonebook/ call logs • Codec G.711, G.729a/b • Comfort noise generation (CNG) • Voice activity detection (VAD) • Acoustic Echo Cancellation (AEC) • Net Search • Auto Scan • TFTP Provisioning • STUN support • Charging via USB on PC or adapter possible. • Very low power (longest standby/talk time) • Light and small: Breast pocket design Packaging information: • Earphone, • USB cable, • Adapter  • Phone dimension: 105 * 47 * 15mm • Color box dimension: 150 * 130 * 45mm • Weight: about 100g