Features: 100% brand new and high quality This ring coupler is also called a hybrid ring, which is a kind of power divider. It can also be regarded as a directional coupler with 3DB coupling. When measuring the main signal, take the 3DB signal as a test Use, because there is a certain degree of isolation between the two channels, so the measurement will not have much impact on the main signal product Frequency range 2.3GHZ~2.5GHZ; S21 is greater than -3.8dB; S11 is less than -15dB; S22 is less than -15dB; 5. Test results Package Includes: 1 x Ring Coupler Specifications: Product Size: approx 50x50MM/1.97x1.97in without SMA Product weight: 12 grams Material:PCB Colour:Brown Frequency : 2.4GHZ ( 2.3GHZ~2.5GHZ) S21-3.8dB S11-15dB S22-15dB note: Only the above package content, other products are not included. Note: Light shooting 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.