Clarity (now Forester Solutions) PTS-500-OP5-00 is the Push-to-Signal amplified handset with a 25ft coil cord.  User can use the phone like a 2-way radio. Speically designed for 911 radios dispatch operators, FAA, dispatch consoles, where 6-conductor cord is required.  PTS-500 allows private conversations. 

Key Features:

• Push-to-Signal (PTS) Initiates radio signal transmission
• Hearing aid compatible
• OP5 - 25' coil cord, hardwired with a 6-wire dual prong plug
• CRBN Carbon Transmitter - 8 Volts DC
• One year warranty
• Other part# PTS500 PTS500OP5 50296-001

*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, Clarity will replace it for you under warranty