You will receive 2 Units! ProSmile is an easy to use pen that applies an all natural effective and refreshing teeth whitening formula in minutes. It contains natural ingredients designed for gentle teeth whitening at home or while on the go. Use in the office, in the car or anywhere. Notice a difference in just hours. Formulated with safe ingredients to deliver the most amazing results in the shortest amount of time. Just turn the base of the pen clockwise, then apply whitening gel to the area of your teeth you'd like to be brightened. Rinsing is not necessary. ProSmile is safe to use everyday.