Clarity PTS-500-OP3 (now Forester Solutions) is the "Push-to-Signal" amplified handset with a 9ft cord.  It allows the user to initiate special phone functions such as switching to a 2-way radio. Designed for radios, FAA, dispatch consoles, where 6-conductor cord is required.  It allows listening easier in environments with background noise and private conversations. 

Key Features:

• Push-to-Signal (PTS) Initiates radio signal transmission
• Hearing aid compatible
• OP4 - 9' coil cord, hardwired with a 6-wire dual prong plug
• CRBN Carbon Transmitter - 8 Volts DC
• One year warranty
• Other part# PTS500 PTS500OP3 50294.001

*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