想知道投球的速度多少嗎？?用這款棒球測速器，測一下吧！
這台是有LCD螢幕顯示，需要安裝電池才能打開設備並使其正常工作。
精度為+/- 1.0 MPH
可以追蹤球速的範圍從10英尺到110 MPH
使用上要與球的來向平行，描準球的時候按壓扣板機，扣板機放開後會顯示最快速度，以KMPH或MPH顯示，可切換速度單位用公里顯示或是英哩顯示。
Severity: Notice
Message: Undefined index: uid
Filename: modal/messenger_auth_modal.php
Line Number: 33
Backtrace:
File: /var/www/public/application/views/modal/messenger_auth_modal.php
Line: 33
Function: _error_handler
File: /var/www/public/application/views/inc/footer_view.php
Line: 8
Function: view
File: /var/www/public/application/core/Ext_Controller.php
Line: 131
Function: view
File: /var/www/public/application/controllers/Device.php
Line: 242
Function: loadView
File: /var/www/public/index.php
Line: 315
Function: require_once