This is a used item. It's being sold due to a move. The channel up button and volume buttons on the upper right do not work. This is a defective item. Model number: N2QAYB000186 [Power-on confirmation] - Infrared check performed on each button. Note: Not all functions are guaranteed. [Cleaned] - Simple disinfection with alcohol has been performed. [Shipping method] - Will be sent with simple packaging.