This alert is an ideal emergency alarm for the elderly and disabled to call for help. The call button can be worn as a pendant or carried in the user's pocket. The receiver can be wall mounted or placed on a table. This easy-to-use alert has 23 different melodies and 9 sounds to choose from and 3 different receiving options on the pager. The pager and the call buttons have up to a 600ft range. 2 buttons for 2 users with 2 different notification options (sounds for one and melodies for the other) for distinction. ************************************************************************************************************************************* 2 Button Caregiver Alert System FAQS Q. Does this unit require WI-FI or internet? A. No it does not. Q. Can I have more than one receiver? A. Yes, one button can activate two receivers. Q. What is the range? A. The buttons can alert the receiver up to 600 ft. Q. Are the buttons waterproof? A. Yes. The buttons have an IP65 rating. Meaning they can been worn in the shower but cannot be submerged into water. Q. Can I set the receiver to vibrate? A. No. You can set the receiver to Flashing Light and Sound, Flashing Light only, or Sound Only. Q. Can the caregiver and the patient talk through the alert system? A. No. Q. What type of batteries are used? A. The receiver will use (3) AAA batteries (not included) and each transmitter will use (1) CR2023 battery (included).