30 hrs. Size: 3.0" x 9.5" x 1.75" (77 x 240 x 47) mm Weight: 1.1 lbs (500g) Probe Length: 16" (406mm) Speaker Gooseneck Battery Sensor Earphone jack Visual leak indicator On/Offswitch Compartment Standard Accessories Sensor: A739 Instruction Manual: 720b Instruction Manual Soft Pouch A700 Optional Accessories Hard Case A714 Earphone A710 General Description The 720b is an advanced state-of-the-art leak detector capable of detecting many combustible, noncombustible and toxic gases. The following