The SpectraLink i640 Wireless Telephone was designed to meet the most demanding environmental requirements and includes a larger earpiece and noise suppression for loud environments as well as Polycom's exclusive push-to-talk functionality. The handset is small enough to be highly mobile, yet rugged enough for heavy usage.
802.11b radio
Sturdy industrial form factor
PTT functionality
Enlarged earpiece for operation in noisy environments
NiMH Battery Packs supporting four hours talk time and 80 hours standby time