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BackAudioJack2 | Audio Jack, 2 Poles (Mono / TS *(optional) SIP socket, 2.54 mm, 1x2 (see [build notes](build.md)) | | | | R20, R22 | 3 | 2N3904 | Small Signal NPN Transistor, TO-92 KK254 Molex header 2.54 mm spacing"/>
AudioJack2 | Audio Jack, 2 Poles (Mono / TS *(optional) SIP socket, 2.54 mm, 1x2 (see [build notes](build.md)) | | | | R20, R22 | 3 | 2N3904 | Small Signal NPN Transistor, TO-92 KK254 Molex header 2.54 mm spacing"/>