Brand new in box. Never tested. Essential Oil Diffuser by Radha Beauty. 120 ml (4 oz) capacity. Comes with measuring cup, adapter with 4-ft cord and user manual. Operates approximately 8 hours continuously on one filling. Quiet operation. White, sleek, modern design. This is an excellent basic diffuser. Measures 6” tall, 2” across the top. From a non-smoking home.