High Mid and low Mid dials (blue) are each paired with a freq control (lighter blue) that allows you to select the frequency boosted or cut.
低中高表盘(蓝色)与一个引入FREQ控制(淡蓝色每个配对)，允许你选择的频率提高或降低。
By varying VR1 you can set how fast the siren changes from high freq. to low Fred.
通过改变VR 1你可以设置多快从高频率警报的变化。低频率。
By varying VR1 you can set how fast the siren changes from high freq. to low Fred.
通过改变VR 1你可以设置多快从高频率警报的变化。低频率。
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