MULTI-FUNCTIONAL WIRELESS DOORBELL KIT The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Previous page Next page 1 IDEAL FOR SENIOR 2 DEAF COMMUNITY 3 HEARING IMPAIRED 4 CLASSROOM MANAGEMENT 5 OFFICE NEVER MISS A VISITOR OR DELIVERY Mute 0dB Mode to Loud 110dB Reminder Portable doorbell chime has 5 levels of volume ranging 0dB to 110dB, matching occasions whether it's a quiet rest time or a lively joyful party.Also equipped with 20 ringtones, you can choose different tones for push buttons installed at various locations to accurately arrive and fast open door.