24 Wireless mics/ expansion speakerphones/headsets VTech ErisStation Conference Phones Connectivity Analog (PSTN) SIP USB Bluetooth DECT 6.0 Audio Full Duplex Echo Canceller Noise Reduction Codecs Wideband Functionality PoE SIP Lines/Accounts SIP Softkeys Navigational Pad Phonebook WebUI for Phonebook Management Redial Distributed Mute Access Date and Time Speed Dial Keys USB for PC Softphone/Speakerphone Bluetooth Connectivity for Headset and Mobile Pairing Wireless Expansion Microphones Wireless Microphones Integrated Charging Bays Other Standard Warranty VCS702 VCS704 VCS754 VCS752 VCS850 P Wireless mics Wireless mics Wireless mics Pair up to 3 per VCS752 P P P P P P P P P P P P P P P P P P G.711, G.722, G.726, G.729ab G.711, G.722, G.726, G.729ab P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P 2 3 3 3 3 Up to 3 3 6 6 3 2 4 4 2 2 years 2 years 2 years 2 years 2 years (Expansion speakerphone accessory to VCS752) P R O D U C T C O M P A R I S O N S VTech Headsets Accessory Headset Only (VSP700 Series / VCS752) Up to 500 Feet of Range HD Voice and Wideband Audio Electronic Hook Switch (EHS) Compatible USB Softphone Compatible Softphone Call Manager Hot Swappable Battery Multiple Wearing Styles Secure Magnetic Charging Cradle One-Touch Call, Answer, End, Volume Level and Mute Includes Lifter for non EHS Phone Noise Canceling Microphone VH621 P P P P P P P VH6210 P P P P P P USB mini port P P P P VH6211 P P P P P P USB mini port P P P P P VH6212 P P P P USB dongle P P P P