Based on this product's specifications, here are some alternatives and similar models
Sonic toothbrush Philips 4100 Series HX3681/54
Summary description:
The Philips 4100 Series HX3681/54 Sonic electric toothbrush is designed for children, featuring daily care and sensitive brushing modes. It operates on a built-in lithium-ion battery, ensuring convenience and longevity. This toothbrush includes one handle and one brush head, making it an ideal choice for effective oral hygiene.