SONY WALKMAN RDP-NWC11 FM/AM Radio Clock Walkman Dedicated Speaker Purchased about 10 years ago. I haven't confirmed the operation since I no longer have a Walkman, but the power turns on. The backup lithium battery in the main unit has never been replaced. I left batteries in the remote control, so I don't know if it works. There are no batteries in the remote control now. There is an instruction manual, but it has some stains. The section with my name on the warranty has been cut out. There is no problem reading the warranty. Please understand the above before purchasing. #Walkman #SONY WALKMAN RDP-NWC11