The WF103 130ml Aroma Diffuser comes with USB port. It's mini size suit for table, computer , desktop, etc. The wooden oil diffuser is also a good artisitc decoration for desktop. Features: 1. Design- mushroom design, cute, exquisite,mini, portable 2.Silent operation-Ultrasilent 30-35db(A) 3. Safe- automatic shut off 4. Stylish touch switch Technical Specification: 1.Capacity:130ml 2.Voltage:DC5V 3.Power:2W 4.Noise level:30-35db(A) 5.Material:ABS+PP 6.Colorful LED light 7.Ultrasonic frequency:24Mhz Application: This Ultrasonic Wooden Oil Diffuser 130ml WF103 is perfect for Bedroom, Office, Corridor, Pet room, Toilet, baby room, Hotel, Hospital or any other private / public circumstance. Packing details: Unit:10*9.5cm Box size:12*12*16cm Unit weight:0.15kg Qty:36 PCS/CTN CTN:51x39x51cm N.W/G.w:10.5/12kgs Certification/Quality Approvals:CE/RoHS/FCC/UL