You need to keep a few things in mind when looking to buy an electric blanket, those are:
Auto Shut-Off Timer: This ensures that you don't have to get up in the middle of your sleep to turn your blanket off as this feature takes care of the auto shut-off.
Heat settings: It helps you control and finds the right temperature for you so you sleep comfortably.
Dual controls: This feature works best with double, king and super king sizes as it allows you to set different levels of warmth on either side.
Overheat protection: This is an essential safety feature as it helps provide protection by automatically turning off the electricity as soon as it senses overheating.
Temperature sensors: This feature can be very comforting as it will detect the room temperatures and adjust the temperature of the electric blanket accordingly.