Fangrui Product Details Designed For Measuring The Frequency And Power Of Radio Equipment, Such As E And Car-mounted Radio Device. Built-in Dummy Load, Convenient To Use And The Testing Result Is More Reliable. With An External Antenna, It Can Only Measure Frequency With Non-contact Way. Fequency Measurement Range: 1mhz-2400mhz. Power Measurement Range: 0.1w-50w. Ideal Tools For Signal Testing And Radio Maintenance. Specifications: Frequency Measurement: 1mhz-2400mhz Power Measurement: 0.1w-50w Sampling Time: .0.2s Working Temperature: 0-40 Celsius Current Consumption: .100ma Power Supply: 3 X 1.5v Aaa Batteries(not Included) Item Size: 9.5 X 5.5 X 2.5cm / 3.7 X 2.1 X 1in Item Weight: 86g / 3.1oz Color: Yellow Material: Plastic + Metal Package List:1 X Frequency Counter (battery Not Included) 1 X Antenna 1 X Pair Of Cable 1 X User Manual Note:light And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3 Cm.