Improved firmware, new fitting algorithm and multi-point correction algorithm. Its display modes include normal mode and hold mode(PEP mode). Multi-interface display mode all adds dynamic analog display bar, and the power status is more intuitive under SSB. Fitting algorithm (according to the characteristics of detection diode) + multi-point correction algorithm + dual reference segment detection make the accuracy 5% over the entire power range of 0.5W to 200W. There are 5 interface display methods. High-speed average detection mode and real-time efficiency display. When standing wave ≥ 2.0, it enable intermittent beep alarm. When standing wave ≥ 3.0, it trigger continuous beep alarm. With built-in lithium battery, it can be used for more than 50 hours on a once charge. Specifications: Frequency range: 1.6-50MHz Power measurement range: 0.5W-200W Standing wave measurement range: 1.0-99.9 Insertion loss: Less than 0.12dB Insertion of standing waves: ≤ 1.02 at 1.6-30MHz; ≤ 1.05 at 30-50MHz Measurement accuracy: ±5% Impedance: 50Ω Standing wave alarm: when standing wave ≥ 2.0, it enable intermittent beep alarm. When standing wave ≥ 3.0, it trigger continuous beep alarm. The alarm can be turned off RF interface type: so239 Display content: forward power, standing wave, antenna-end power and efficiency Power supply: built-in rechargeable lithium battery or USB type-c Power consumption: Less than 0.1uA Screen size: 1.29 inches Colour:black Material:Composite Materials Attention: The above parameters are measured by professional instruments and are true and effective. It can be used continuously for 200W detection for a long time. More than 500W damage the detection components. Package Contents: 1 SWR 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.