规格：
1. Pulse Testing Method. 2. Polarity: Pos. polarity :GreenLED indicator with beep sound. Neg. polarity : Red LED indicator with nosound. 3. Sensor : ECM 4. Five selecting switches: WF : suitable for the woofer. M & T : suitable for the midrange,tweeter & headphone. Ext.1~Ext.3 : For connectinginstruments. 5. Dim. : 28 ( L) ×9 ( H )×21 ( D ) cm. 6. Net Weight : 2.5KGS.