I used this about five times after purchasing it, and then it sat unused. The instruction manual is damaged, possibly due to where it was stored. The main unit is clean. One owner, operation confirmed. Manufacturer Model Number: HBF-701 Size: Approximately 300mm wide x 51mm high x 325mm deep Weight: Approximately 2.2kg Materials: ABS/PC/SUS Power Consumption: 0.12W Country of Origin: China / Warranty Period: 1 year Power Supply: 4 AA manganese dry cell batteries (R6) [AA alkaline batteries (LR6) can also be used] Memory: 1, 7, 30, 60, 90 days ago Settings: Number of registered users (4), Height (100.0~199.5cm), Age (10~99 years old), Gender (Male/Female) Operating Environment Temperature/Storage Environment Temperature: +5~+35°C 30~85%RH / -20~+60°C 10~95%RH Accessories: 4 AA batteries for trial use, Instruction manual (with quality guarantee)