The Ellia Wander Cordless Ultrasonic Aroma Diffuser makes it even easier to enjoy your favorite essential oils from an aesthetically pleasing base. This completely cordless diffuser can be placed anywhere you’d like to enjoy convenient aromatherapy, for up to 4 hours continuous or 8 hours intermittent runtime. Ultrasonic technology delivers a fine mist of your favorite essential oil to enhance your mood, and the soothing humidity alleviates dry air. You find the best things when you Wander. This diffuser has a 1-year limited warranty.