IN-STOCK Poly CA22CD-SC is a wireless PTT (push-to-talk) headset single channel with a PJ-7connector. CA22CD-SC is designed to provide wireless encrypted communications and PTT functionality for mission critical radio dispatch applications such as police, fire stations. air traffic controllers. This Poly CA22CD-SC Comes with extra lithium battery for 24/7 operation with the highest level military 256-bit encryption available. 3X less latency PTT (Push-To-Talk) than other models Key Features: PJ-7 connector Talk time up to 10 hours Wireless range: Line of sight up to 100 ft/30.5 m Military level FIPS 140-2 listed 256-AES encryption DECT 6.0 Operates in 1.92 - 1.93 Ghz Two charging wells (a spare battery included) Battery recharge time: 2 hours to full, capacity 440mAh selectable locking/non-Locking operational PTT modes. Wideband 100 - 6800Hz Status LED lights for Power, Battery Charging and PTT Analog and USB connection ports on the base (micro USB cable sold seperately) Sending and receiving volume controls on the base Supported systems: Most manufacturers of Voice Communication Consoles, such as Frequentis, Indra, Sitti, Motorola, etc. Quick Disconnect™ provides compatibility with all Plantronics H series headsets Old Poly part # 217100-01 New HP part # 8K774AA#ABA Note: Spare parts backward compatible (ex: battery pack, remote, etc.) from Plantronics CA12CD-S (or CA12CD) are not compatible with Poly CA22CD-SC. *Important Note on Returns: Due to the manufactures policy, this is a special order item. All Sales are FINAL. It's not returnable, not refundable under any circumstance. If it's defective, Plantronics/Poly will replace it for you under warranty