Based on this product's specifications, here are some alternatives and similar models
Power Adapter/Inverter EXSYS EX-6991 Indoor Black
Summary description:
The EXSYS EX-6991 is a versatile indoor power adapter/inverter designed for universal use. It supports input voltages from 110 to 240 V, making it suitable for various devices. The compact black design features a 3.5mm connector, ensuring compatibility with a wide range of electronics. Its reliable performance and sleek appearance make it an ideal choice for powering your devices indoors.