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Comes with free rubber boot and DC Voltage/Current Tester (Item: MT-8006VA).
Loop limit: 2 KΩ maximum at 48 Vdc, (nominal 20 mA minimum loop current)
DC resistance: Talk Mode - 300Ω typical Monitor impedance - >39kΩ nominal at 1 KHz
Rotary dial output: Pulsing rate - 10pps+0.8pps Percent break - 60/40%±2% Inter digit interval - 1000 ms typical Leakage during Break - >130 KΩ
DTMF output: Tone frequency error - ±1.5% maximum Tone level - -8±2dBm combined (typical) High versus low tone Difference - 4 dB maximum
Memory dialing: Memory capacity - 12 memories Digit capacity - 16 digits per memory PBX pause duration - 1~3.6 seconds Power source - 4pcs 1.5V AAA batteries (not included)
PHYSICAL(Hook included) Measurement - 8.6" x 2.7" x 1.9" Weight - 0.46 lbs