更多细节 : 

Pirelli DP-SW20 Dual Mode WiFi VoIP GSM Phone Quick Overview The Pirelli DP-SW20 is a small lightweight full-featured Dual-Mode phone that operates VoIP AND GSM simultaneously. In a WiFi hotspot? Make and receive calls using VoIP. On the go? Add a GSM SIM card and you've got cellular service available. Install Skype Mobile (download link below) and you've got all 3 of the best methods of communication. Operating System - Windows Mobile 6.5 Processor & Memory - TI OMAP 730 200MHz - ROM: 128M RAM: 64M Cellular Protocols / Bands - GSM Quad-Band 850/900/1800/1900MHz GPRS Class B, multi-slot class 10 Phone Features - Call Hold - Call Forward - Call Transfer (VoWiFi) - Call Waiting - Call Mute - Call block - 3-Way Conferencing - Speaker Phone - Speed Dialing - Call history : 30 entries - Phone Book Storage: 1000 entries WLAN Features - WiFi 802.11b/g, 2.4GHz - WEP, WPA-PSK TKIP, WPA2-PSK AES EAP-TLS/SIM/PEAP - Fast Access Point Roaming - WME QoS - VPN VoIP Specifications - Protocol : SIP: IETF RFC 3261 - Codec : G.711a/μ,G.729a/b - Acoustic Echo Cancellation - Dynamic Jitter Buffer - Voice Activity Detection - Stun-based NAT traversal - DTMF Support (In-band, Out-band, RFC 2833) SDP(RFC 2327) - Multi SIP account profile Display & Camera Specs - Main 1.9” QCIF- TFT, 240x320p, 65K color depth - 1.3M pixel VGA Still & Video Recorder - Picture Size: Max 1280x600 Microphone / Speaker - Built-In Dual and Hands-Free Installed Applications - Active Sync - Internet Explorer Micro Browser - Internet Sharing - Windows Live Messenger - Microsoft Office Mobile - Calculator, Task Manager, Calendar - Call History - Camera - Contact List - File Explorer - Games - E-mail (Outlook email, POP/SMTP, push email) - Pictures & Video Browser - SIM Card Manager - Windows Media Player: (MP3, asf, avi, wma, wmv, MP4, midi) - Personal Voice recorder - SMS, MMS 1.2 - WAP 2.0 - JavaVM Ringtone & Player Formats - Midi, wav, mp3, AAC, AAC+ Connectors & Slots - Charging & data transfer - MicroSD Slot For Added Memory Complete Package Includes: • 1x Dual-Mode WiFi VoIP GSM DP-SW20 • 1x Headset with earphone/microphone • 1x Li-Ion Battery (3.7v 1100mAh) • 1x travel charger with mini-USB plug • 1x mini-USB cable • 1x User manual Standby Time: 230 Hours -- Talk Time: 4-5 Hours Dim: 4.25" Height x 1.77" Width x 0.66" Depth Weight: 3.39 oz