Features 1.REDUCE ANXIETY: Can properly stimulate the hands, make the hand brain frequency is the same, relieve anxiety. Safe, promotes relaxation, releases stress and provides you with sleep aid. 2.IMPROVE SLEEP: This sleep aid device mainly helps with insomnia, help fall asleep, improve sleep quality, but need to be used continuously for half a month. 3.EASY TO USE: Sleep aid device puts the pulse best sleep aid in your right hand. Grasp the device with the palm of your hand so that the electrode is centered. 4.EASY TO CARRY: With a compact wireless design, you can use it anytime, anywhere. The lanyard can be hung on the wrist to prevent falling and breaking. 5.APPLICATION: The sleep aid can be used for study, office, home and business travel. Use 20 minutes a day to relieve headaches, help you eliminate stress, anxiety, sleep problems. Specification Item Type: Handheld Sleep Aid Device Material: ABS, electronic components Size: Approx. 40 x 37 x 67mm / 1.57 x 1.46 x 2.64in Battery: Lithium battery, 5V, 300mah (shipped with built in battery) Package List 1 x Handheld Sleep Aid Device 1 x Instruction Book 1 x USB Cable