This could mean a computer that is too slow to run the programs you need. A dish washer that doesn't get all the food off. Or an alarm clock that isn't loud enough.

可能是驱动软件速度很慢的计算机，无法完全洗清残渣的洗碗机，或是叫得不够响的闹钟。

youdao

But not just any alarm clock -- this is an alarm clock with potential.

ENGADGET: Inside Google's amazing Accessory Development Kit demo hardware (video)

This is according to a patent application the company filed that proposes, among other things, an advanced alarm clock that monitors brain waves to detect when you enter and leave REM sleep.

ENGADGET: Sony patent application puts electrodes in a pillow, eases you out of slumber