双彩网
<tr id='X3eEE8'><strong id='X3eEE8'></strong><small id='X3eEE8'></small><button id='X3eEE8'></button><li id='X3eEE8'><noscript id='X3eEE8'><big id='X3eEE8'></big><dt id='X3eEE8'></dt></noscript></li></tr><ol id='X3eEE8'><option id='X3eEE8'><table id='X3eEE8'><blockquote id='X3eEE8'><tbody id='X3eEE8'></tbody></blockquote></table></option></ol><u id='X3eEE8'></u><kbd id='X3eEE8'><kbd id='X3eEE8'></kbd></kbd>
无线话筒特点： 1.采用2.4G数字化技术，无串频干扰 2.内置充电锂电池，充满连续工作8小时 3.教学专用设计，小巧耐用、故障率低。
