1、Perfect diffuser to bring you fragrance and good mood while study, working or sleeping. 2、Adopts advanced technology to get the purest and most concentrated fragrance across a large area in a very short period of time. 3、Lightweight and compact design, easy to carry and storage. 4、Super quiet design, effectively reduces noise while working and won't disturb your rest or sleep. 5、Built-in 2000mah lithium battery and USB rechargeable, easy and convenient to be charged by computer or power bank and can work for 7 days each charging. Features: Perfect diffuser to bring you fragrance and good mood while study, working or sleeping.  Adopts advanced technology to get the purest and most concentrated fragrance across a large area in a very short period of time. Lightweight and compact design, easy to carry and storage. Super quiet design, effectively reduces noise while working and won't disturb your rest or sleep. Built-in 2000mah lithium battery and  USB rechargeable, easy and convenient to be charged by computer or power bank and can work for 7 days each charging. Specification: Material: ABS + PP Color: Wood  / Black / White (Optional) Voltage: 100-240V Output voltage: DC5V Power:3W Capacity: 100ml Suitable area: 15-25 ㎡ Size: Approx. 72*42*128mm / 2.9* 1.7* 5.0 inch  Package list: 1 * Essential diffuser  1 * USB cable  1 * Essential oil bottle(Essential oil not included) 1 * User manual