Questions about Panasonic Rp-Tca430e-S

Yes, the Panasonic RP-TCA430E-S headset is designed to be adjustable to both ears. The microphone boom is flexible and can be rotated or reversed to be worn on either the left or right side.

Unfortunately I don't know. Sorry !

I bought this for another cordless phone, but as long as the jack fits (2.5mmm), it shouldn't be a problem.

Good morning kuonilt5062, we operate the RP-TCA430E-S on a Gigaset cordless phone. The size of the jack (2.5mm) is important. Check which jack size (headset jack) your Offic 135Pro has. In general, we are satisfied with the RP-TCA430E-S, but sometimes it would be good if the volume could be turned up a notch (depending on the ambient noise). It's worth mentioning that the Panasonic RP-TCA430E-S was the only 2.5mm jack headset we found. I advise against using transition plugs. Thus, for us it was a test with a possible bad purchase - which fortunately did not happen. Best regards, Th