Check the listing for details. Caregiver Pager Wireless Call Button for Elderly,Emergency SOS call bells elder. Color: Black, Condition: New. Listed at 25.86 USD. New SOS call bell button design for 2025. One-piece silicone is more waterproof with better performance, flying saucer triangle appearance design is better looking, more wearing and installation ways to adapt to more application scenarios. Can DIY combine products: An LED digital display receiver can support up to 9 SOS button emitters working together, displaying 1 to 9 digits. This way, if you need it, you can purchase more one click help pagers to expand the product yourself to meet your needs. Can DIY more receivers: You may need more receivers, some on the first floor, some on the second floor, some on the third floor or in different offices. You can purchase more LED digital display music doorbell receivers, paired with more SOS pagers, so that no matter which floor.