Convenient Call Button: The 30mm enlarged call button allows for easy pressing, especially for the elderly in emergencies Portable : With a neck hanging , this doorbell can be carried anywhere for added Long Standby Time: With just one charge, the doorbell can standby for up to half a year, thanks to the 1200mA large battery Waterproof and Colorful: This doorbell features a waterproof function and colorful rhythmic lighting, for any household Wireless and Intelligent: The intelligent wireless music doorbell is plug-in free and suitable for elderly callers, providing high volume and colorful music options, Weight: 0.3968320716 pounds, Manufacturer: KIXZSAZ