Features: 1. The product adopts a simple oval design, with a new matte texture and vibrant colors, comfortable to grip. 2. Easy control, you can stimulate the neurotransmitters in the cerebral cortex through a micro electric current tutralize you emotions and promote sleep. 3. Whether you're suffering from chronic insomnia, life stress, anxiety or depression, having trouble falling asleep, waking up in the middle of the night, or jet lag,this sleep aid gadget will help you fall asleep more easily. 4. Relax mode is best for left hand, active mode for right hand. After adjusting to your own comfortable mode and gear, you can easily enter deep sleep. Specifications: Material: ABS+stainless steel Color: white, blue, yellow Size: 7.5*5*3.5cm Weight: 50g Power supply: USB rechargeable Packing list: 1* Sleep Aid 1* USB Charger Cord 1* Hanging String 1* User Manual * Battery is not included. Note: 1. Due to manual measurement, there may be a slight tolerance of 1-3cm. 2. Due to difference between different monitors, the picture may not reflect the actual color of the item.