Used for testing telephone lines. Lightweight and compact with last number redial and 10 number memory. Water resistant dial pad.

Features:

• Integrated circuit voice network provides optimum receive and transmit levels and controld sidetone without drawing excessive current
• Talk/Ring/Monitor switch conveniently located inside handgrip
• Switchable tone or pulse dialing withy switch located on inside of handgrip
• High impedance monitor will not disturb data, conversations or signaling
• Polarity indicator
• Last number redial (up to 31 digits)
• 10 number memory storage maintained by a 3 volt lithium battery
• 3 position volume control for up to 12dB of gain
• Protection against excessive voltage, transient ringer signals, and direct connection to most batteries and power supplies
• Spring loaded reversible belt clip
• Cloth covered cord equipped with securely anchored strain relief, modular RJ11X plug and 2 five-way test clips
• Spade connector cord included
• Moisture resistant
• 2.5mm headset jack

Also known as a lineman's handset, a test set, or a butt set.