I have this part, and since I cut my hair with it, my once thinning hair grows full and lush again! And I don't have any grey hair any more either.
No, nonsense, that's a mistake, I doubt I paid more than 100.- for it back then.
According to our own research, the model ER1411S503 is a newer version and has different operating times. The model ER1411S503 has an operating time of up to 80 min and the model ER1411S501 has an operating time of up to 50 min :)