CallToU Caregiver Pager 6 Waterproof Button with 2 Plug-in Receiver Color:6 call button + 2 receiver The max volume 110dB is

The max volume 110dB is loud enough to be heard anywhere in the house even basement

Choose from 55 unique ringtones and adjust the volume from 0-110 dB to suit your needs

8 ounces Product Dimensions ‎2 x 3 x 6 inches/6

divided into three kinds: F3-1

Please make them back to back and have a longer distance

CallToU Caregiver Pager 6 Waterproof Button with 2 Plug-in Receiver Color:6 call button + 2 receiver The max volume 110dB isLARGER WORKING RANGE: 2 plug in receivers with digital number display and 6 call alarm buttons. With a receiving range of 500 feet 150 meters, two digital number receivers can make the receiving range wider. You can put one in the bedroom and the other on different places of different floors hallways or anywhere, as long as there is a plug socket SET NUMBERS for DIFFERENT CALL BUTTONS: Each call button for different number. You can put call buttons in