Based on this product's specifications, here are some alternatives and similar models
Wireless doorbell EMOS P5728, 90 dB sound level, battery-powered (3×AAA)
Summary description:
EMOS P5728 is a wireless doorbell with a maximum sound level of 90 dB, powered by three AAA batteries. The kit provides wireless operation without mains wiring, convenient installer-free setup and placement at the door and indoors. Suitable for homes, apartments or small offices to notify occupants of visitors and deliver a loud, clear chime.