Features How it works - Our vibration tester uses a piezoelectric acceleration converter that transmits the vibration signal into an electrical signal, analyzes the input signals and displays the vibration speeds, acceleration and displacement. Wide range of applications - The vibration meter can be used in mechanical manufacturing, electrical energy, chemical technology, aerospace and aviation and other areas. Two temperature units - The vibrometer can measure the ambient temperature with 2 temperature units (°C and °F). Clear LCD display - The LCD shows measurement results and conditions directly. Specification - Large measuring range of acceleration: 0.1~199.9m/s 2 tips. Specification: Model: HT-1201. Colour: grey. Vibration detection: piezoceramic accelerometer (shear type). LCD display: three and a half digit display. Measuring range: Speeds: 0.1-199.9 mm/s (RM). Displacement: 0.001-1.999 mm (RM). Measuring accuracy: ± (5% + 2 digits). Frequency range: Acceleration: 15 Hz - 1 kHz (LO), 1 kHz - 10 kHz (HI) speeds: 15Hz - 1KHz (LO) shift: 15Hz - 1KHz (LO) temperature measurement 0℃ - 60℃ Temperature accuracy: ± 2 °C. Automatic shut-off time: 4 minutes. Power supply: 3 x AA batteries (not included). Operating temperature: 0 °C - 45 °C. Operating humidity: 20% RH - 90% RH (no condensation). Storage temperature: -20°C to 60°C. Size: approx. 150 x 70 x 32 mm / 5.9 x 2.8 x 1.3 inches. Approximate weight 737 g / 26 ounces. Package list: 1 x vibration knife. 1 x probe. 1 x handle. 1 x plastic box. 1 x user manual (English language not guaranteed). Note: Do not disassemble the housing of the instrument. Do not use the device in environments with explosive gases, vapours and humid environments. If the measurement is carried out near a rotating part of the machine, proceed carefully to avoid being pulled into the machine. Please wipe the instrument case with a dry cloth at the time of cleaning. Do not use corrosive detergents. Please take out the battery if the instrument is not used for a long time or the storage temperature is higher than 50°C to avoid corrosion of the instrument due to leakage of the battery. Please allow small size errors due to manual measurement. Thank you for your understanding. Package List 1 x Vibration Meter 1 x Probe 1 x Handle 1 x Plastic Box 1 x User Manual