Features: 

• Reads ground resistance down to 0.10 Ω
• Fully auto-ranging with data hold to capture readings
• Accessories included: Molded carrying case, 9V Alkaline Battery and calibration verification loop
• Impedance function capable of testing 4 separate frequencies (50Hz, 60Hz, 128Hz, & 2083Hz)
• Widest operating temperature range ( - 4 to 131°F) in the industry