The 100ml Black Mini Majesto Essential Oil Diffuser by SpaRoom is a compact and powerful ultrasonic diffuser that can run for up to 5 hours. This diffuser is designed for easy cleaning and maintenance, with a sleek black design that fits in any room decor. It features ultrasonic aroma diffusion and automatic shut-off for convenience. The diffuser is BPA-free and powered by a USB source, making it a safe and energy-efficient option for adding a calming scent to your space. With a 1-year limited warranty, this diffuser is a reliable choice for aromatherapy.