1. The use of materials, quality assurance 2. With antenna power and effective antenna efficiency display 3. The product is easy to use 4. With OLED display 5. Built-in battery 120W SWR Digital Power Standing Wave Meter FM AM SSB Modes Power Meter Support Adjustable Product parameters: Frequency range: 1.8mhz-54mhz Measurement range: 0.5w-120w (up to 210W, long time FM,AM,CW mode, less than 120w recommended,SSB mode optional) Measurement accuracy: Less than 5% Standing wave range: 1.0-99.99 Access interface: SL16 Charging interface: Type C Battery capacity: 1000mah Insertion loss: Less than 0.1dB Charging displays red, all green and yellow during operation When the standing wave is 2.5, the buzzer alerts intermittently If the standing wave is 3.0, the buzzer continue to alert If the battery is under voltage, the buzzer continues to alert Color:As Shown Material:Plastic+Metal name: SWR and Power Meter Color: As shown Package Contents: 1 x SWR and Power Meter Only the above package content, other products are not included. Note: Light reflection 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 +/- 1-3cm.