Sonin 50270 with bonus Digital Moisture Test Meter 270 for Wood with Bonus GFI Receptacle Tester Digital Moisture Test Meter with Large, Easy-to-Read LCD Measuring ranges from 2-percent to 70-percent , resolution 0.5-percent Wood Species Selection Function. Measures moisture content in soft and hardwoods including tropical species Automatic Temperature Compensation Function, includes Protective Pouch and Replacement Probes Checks for correct wiring of receptacle and all remotely connected receptacles on the branch circuit