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tell me something about tip and ring in cell phone operated land rover?

wants know about "tip" and "ring" in cell phone operated land rover

NachoMahma7 years ago
.  Just Google
tip and ring
I'm more interested in the land rover operated by a cell phone. 
Intriguing isn't it ?
.  OK then. Just Google
tip and ring +"land rover"
.
.  No matter how you look at it, they are talking about the connection points on a plug/jack.