Feature: 1. Easy Operation: This meter has input and output intelligent detection function, and one key switch function. 2. Accurate Performance: This meter makes the accuracy better than 4% in the whole power range from 0.5W to 120W, which has more reference value. 3. Buzzer Alarm: When the standing wave is greater than 2.0, the buzzer will alarm. Greater than 3.0, the buzzer will beep for a long time. Convenient for you to monitor and make timely adjustments. 4. Type C Port: With a type C port, you can use the data cable to charge the meter and transfer data. Very convenient! 5. Aluminum Alloy Material: Made of aluminum alloy, this meter is strong and corrosion resistance, comes with a long life span. Specification: Item Type: Standing Wave Meter Material: Aluminum Alloy Frequency Range: 2 to 54MHz Power Measurement Range: 0.5W to 120W Standing Wave Measurement Range: 1.0 to 99.9 Insertion Loss: Less Than 0.2dB Measurement Accuracy: Better Than ±4% Impedance: 50Ω Standing Wave Alarm: Greater than or Equal to 2.0 (Greater than 3.0 Long Buzzer) RF Interface Type: (Default M) Display Content: Forward Power, Reverse Power, Standing Wave. Power Supply: Built in 3.7V 1000mAh Rechargeable Lithium Battery (Shipped with Built in Battery) Charging: can be Charged by USB Type C Interface Screen Size: 0.96in Screen Type: Organic Light Emitting Diode Data Communication: USB Type C Firmware Upgrade: Support Maximum Measurement Power: 120W. Package List: 1 x Standing Wave Meter1 x USB Cable