Fantastic little gadget for boosting RX and TX power for sub GHZ functions on the flipper zero. Before getting this little booster, I was getting only a few frequencies popping up when using the frequency analyzer function on the flipper zero and now non-stop frequencies popping up even with the RSSI tuned to nearly max. Can now even capture fixed signals from remotes around my street from inside my house using the fixed frequency function where before could only capture these from only about a metre away. Has definitely made my flipper more fun and interesting to use. It came very well packed and protected and tracking on my parcel was excellent. I am extremely happy with my purchase, thank you very much. It was a pleasure doing business with you guys