ExtUSB AV Cable

HTC ExtUSB Connector

A – USB Ground
B – +5V allows phone to suck 1000mA to charge faster
C – +USB Data Line
D – -USB Data Line
E – +5V @ 1000mA (If you only have 500mA ground B)
1 – Video Out
2 – Audio Right
3 – Ground (Video Sense)
4 – No connection otherwise you loose video
5 – Audio Ground
6 – Audio Left
Shield – Ground / Cable Shield

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