Ideal for children. Easy hand held operation. Quiet, powerful operation. Operates on 2 'AA' batteries (not included). Nebulizes to the last drop. Use it anywhere: home, plane, car or in school. Instructional video included. The MicroAir nebulizer provides you the freedom to take aerosol treatments where and whenever you need. Its unique design offers the same effective aerosol treatment as a compressor nebulizer with the portability of a cellular phone. Operating on 2 'AA' batteries (not included) you can use MicroAir anywhere, anytime. MicroAir's efficient medication feed system and vibrating mesh technology assures maximum delivery to patient with minimal waste. No other unit can match these features. Product specifications: Dimensions: 38x51x104 mm (1.5x2.0x4.1 in). Weight: 97 grams, approximately 3.4 oz. Battery: 2 'AA' Alkaline or NiMH rechargeable (not included). Battery life: 4 hours (continuous use). Medication capacity: 7 mL maximum. Vibration frequency: 180 kHz. Nebulization rate: 0.25 mL/min minimum. Particle size range: MMAD approx 5 micrometers. Contents: Power unit, medication bottle, carrying case, mouthpiece, mesh cap, mask and mouthpiece attachment, video and instruction manual.