DB-4C Cable Tester is a must have for any audio or musician. Test all your important XLR microphone, 1/4 inch instrument, line level and speaker cables with this compact device. Can test up to 8 pins, including Speakon NL8 connectors. Easy To Use Simply plug in either end of an audio cable into Left and Right side of the device, then turn the rotary switch to check signal continuity across all active pins / conductors. The brightly colored LED's light up indicating signal continuity and which pins are connected together. Rugged, Compact, Reliable Built with a solid metal construction in a small rectangle shape shell, this cable tester last the whole nine yards on the road and in the studio. Features: Connections: 1/4 inch jack / 6.5mm TRS Jack, 1/8 inch / 3.5mm Jack TRS Jack, XLR 3-Pin M/F, XLR 5-Pin M/F, Phono / , Banana plug, Speakon 8P, Speakon 4P, DIN 3P / 5P / 7P / 8P, CAT5 Individual LEDs Confirm Continuity of Each Conductor as well as Proper Phase Connections Easy to use 8-way rotary control Rugged and compact all metal chassis Case: Heavy-duty all metal construction Indicators: 8 Green LEDs Dimensions (WxDxH): 185 x 55 x 110mm Material: Aluminum alloy + plastic Color: As shown Due to different product batches, the appearance , but it not affect the use Package Contents: 1 x DB-4C multi audio cable tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.