Textron Greenlee 77M-G Manuel D'instructions page 10

Specifications
Electrical
Talk Battery (into 600 Ω): 4.6 VDC
Output Power (into 600 Ω): +10 dBm
Resistive Short Visual Indication: <10 kΩ
Resistive Short Audio Indication
(77HP-G and 77HP-G/6A only): <200 Ω
Output Frequency (nominal):
Tone: Alternating 890/960 Hz
Warble Rate:
Slow: 1.3 Hz
Fast: 6 Hz
Voltage Protection (into a 600 Ω circuit): 52 VDC
Battery: 9 VDC (NEDA 1604, JIS 006P or IEC 6LR61)
Battery Life: 50 hours
Physical
Length: 32 mm (1.25")
Width: 64 mm (2.5")
Height: 57 mm (2.25")
Weight (max): 128 g (4.5 oz)
Operating/Storage Conditions
Operating Temperature: 0 °C to 50 °C (32 °F to 122 °F)
Storage Temperature: -50 °C to 75 °C (-58 °F to 167 °F)
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