Model Number: AMF030 Brand Name: TLead Key Specifications/Special Features: Specifications:1. Display: large LCD characters display2. Range: 0 - 30m/s3. Accuracy: ±3%4. Units: m/s, km/h, mph, knots, ft/min5. Auto power off: after approx.15 minutes6. Power supply: one 9V battery7. Operating temperature: 0 to 40℃ (32 to 104℉)8. Dimensions: 145 x 67 x 32mm (5.7" x 2.6" x 1.3")9. Weight: 170g (6.0oz)