Denver CRL-340NR is a feature-rich alarm clock that can simulate both sunrise and sunset, aiding in a more natural sleep-wake cycle. It offers a choice of six nature sounds to wake up to, adjustable alarm volume, and a snooze function. The customizable backlight can be set to 10 different brightness levels or cycled through a range of colors. Powered by USB or batteries, it also functions as a night light and includes a battery backup to retain settings during power outages.