◎Offer the lastest in integrated circuit design, provide the industry standard packed with popular features.
◎Talk/Ring/Monitor three kind of tests function, its switch located on inside of handgrip.
◎Switchable tone or pulse dialing. TONE/PULSE switch are located on inside of handgrip.
◎The Hi impedance monitor will not disturb data, conversation, or signaling.
◎LED indicates reversed polarity.
◎Last number redial(31 digits maximum).
◎Protection against excessive voltage,transients ringer signals, and direct connection to most batteries and power supplies.