Feature: 1. Relieve Anxiety: Handheld sleep aid machine can properly stimulate hands, make the frequency of hands and brain consistent, relieve anxiety, release stress, and provide you with sleep aid function. 2. Improve Insomnia: Handheld sleep device can relieve stress, help sleep and improve sleep quality. It needs to be used continuously for half a month. 3. Relaxation Mode: Handheld sleeping aid massager pulse is placed in your right hand. Hold the device with the palm of your hand and center the electrode. 4. Widely Used: Can be used for study, office, family and business travel. 20 minutes a day can relieve headaches, help you eliminate stress, anxiety, sleep problems and help you sleep. 5. Perfect Gift: Sleep aid instrument is small and exquisite, with compact wireless design, it is the best gift for friends and relatives, and you can use it anytime and anywhere. Specification: Item Type: Handheld sleep aid machine Material: ABS, electronic component Size: Approx. 40.5 x 38.5 x 68.5mm / 1.6 x 1.5 x 2.7in Battery Type: 5V 300mAh lithium battery (built in). Package List: 1 x Handheld Sleep Aid Machine1 x Manual1 x USB Charging Cable