★★★Final Price Reduction★★★ ★★★Final Price Reduction★★★ ★★★Final Price Reduction★★★ SSK Multi Speed Tester 4 Speed Measurement Device MST400 Excellent Condition Purchased around July 2025 for 29,000 yen. Bought for my child, but used only once and then stored in a closet. There are no scratches, and I think it's in beautiful condition. (Please judge from the photos) I'm selling it because I won't be using it anymore. Operation confirmed. ★A semi-hard case of the right size and AAA batteries are also included in the set. From the following site: 【Size】Length 116 x Width 55 x Height 48mm (excluding protrusions) ・ Weight 131g (including batteries) The long-awaited 4th generation, with a wide screen for easy viewing, approximately 35% lighter, and a more compact size, the SSK Multi Speed Tester IV can also be used for golf and soccer. ● Microwave sensor: Oscillation frequency: 24GHz band (K band) Transmission output: 10mW or less ● Measurable range: ・ Pitching mode, Bat swing mode, Batting mode Swing speed / Ball speed: 30km/h ~ 180km/h ・ Multi-mode Speed: 30km/h ~ 300km/h ・ Golf mode Head speed / Ball speed: 10m/s ~ 90m/s ● Power supply: Power supply voltage: 6V (using 4 AAA batteries) Battery life: Approximately 1 month with 1 hour of use per day ● Operating temperature range: 0℃ ~ 40℃ (however, without condensation) It will be packed with cushioning material and shipped via Mercari delivery. Thank you for your understanding.