This bare-bones analog monitor (using the 49 MHz range) has sound, lights, low battery and out of range alerts.
FYI: There are older, discontinued audio monitors from First Years that are still being sold online. These models had similar features to the Crisp & Clear.
Generally, First Years monitors get very poor reviews. Quality woes dog these monitors with static, connection drops, clicking and other complaints.
There are better choices in this category.
Amazon Customer Reviews: First Years Crisp & Clear Audio Monitor