• [Ultra Long Operating Range ] COSTAR COSMOS wireless doorbell operating range is 300m / 1000ft in open areas. You can install it in any corner in your space • [ 32 Ringtones Available& 5 Volume Mode & Amazing LED ] Find your favorite Ringtones among 32 Chimes. 5 levels of volume for your space. Flashing LED-Light makes it easier for you to notice the coming visitors • [ Suitable for Variable Environment ] The working temperature is from -20° to 60° （-4°F to 140°F）. Multiple Ringtones and LED light make it sutable for home office store school hospital and other spaces
