The following features were downloaded from the Bacharach website... I highly recommend that you Google the reviews of this item... This is one of the best, if not the best leak detector on the market today... The going price for this on eBay, Amazon, and other websites range between $500-$850... This unit is a Brand New... Never used item... Of you want a very high quality leak detector, than this is it... Like I said before, just Google it and see for yourself the extremely high reviews this unit gets...

Features:

• Detects all CFC, HFC, and HCFC non-flammable refrigerants including R12, R22, R134a, R404a, R410a, R421a, R502, R507 and many others
• Ultra-sensitive detection as low as 0.006 oz/yr
• Dual power sources include rechargeable battery and external DC powered wall adapter (included)
• Visual sensor calibration system (with included reference leak bottle)
• Pinpoints small, medium and large leaks quickly and accurately
• Headphone port allows for optional headset for use in high-noise environments

Specifications:

• Sensing Element: Positive Ion Emission Heated Diode
• Sensitivity: 0.006 oz/yr (stationary) | 0.1 oz/yr (moving probe per SAE J2791)
• Sensor Life: 1 year (typical)
• Warm-Up Time: Approx. 2 minutes
• Response Time: 1 second
• Accuracy: Exceeds SAE J1627
• Operating Temperature: 32°F to 104°F (0°C to 40°C)
• Flow Rate: 90 cc/min (typical)
• Auto-Background Adjust:Yes, automatic mode only
• Leak Indicators: Visible LED at probe tip and audible buzzer (with or without optional headphones)
• Probe Length: Flexible 4.5 ft. (1.37 m) with built-in filter
• Dimensions: 10.5” L x 8.3” W x 5.4” H (26.7 cm x 21.1 cm x 13.7 cm)
• Weight: Approx. 5.1 lb. (2.3 kg)
• Agency Listings: UL file SA9717, SAE J1627, CE-Mark
• Power:
  • 12 VDC - internal rechargeable sealed lead acid battery (included)
  • 100-240 VAC wall adapter/universal battery charger to charge or run continuously (included)
• Battery Life: 3 hours (typical)
• Warranty: 3 years (does not cover sensors, filters, reference leaks, airflow balls, lamps, batteries or probe tips)