Zett's speed gun, the Speedmax II. A tripod is not included, but if you purchase a commercially available one, you can attach it to the speed gun and measure speeds by yourself in continuous mode. You can measure not only ball speed, but also swing speed. The original price was 60,000 yen. It uses ultrasonic waves for measurement, so it can measure quite accurately. The main body is relatively clean, but there is some yellowing. The case shows signs of use, but there are no problems with its functionality.