Item Type: Sleep Instrument Material: ABS, 304 stainless steel Size: Approx. 81 x 50 x 31mm / 3.2 x 2 x 1.2in Battery Type: 1 x AAA battery 1.5v (not include) 1ANXIETY RELIEF: Helps people with sleep deprivation and anxiety fall asleep quickly, helps you relax, reduces migraines, reduces anxiety and releases stress. 2PHYSICAL THERAPY: Properly activate the hands to align the frequency of the hands and brain and relieve anxiety. Safe, promotes relaxation, releases stress and provides you with sleep aid. 3RELAX BRAIN: Promote neurotransmitters in the cerebral cortex, regulate emotions, thus promoting sleep and helping you relax your brain. 4WIDELY USED: Can be used for study, office, home and business travel. It can be used for 20 minutes a day to quickly solve sleep problems. 5EASY TO CARRY: Lightweight and portable, can be put into a pocket, the lanyard can be hung to the wrist to prevent falling and breaking. 1 xSleepInstrument 1 x Instruction Manual 1 x Lanyard