Caution: color: according to the color of the first picture, in the package: if the quantity is not stated in the description, the item according to the quantity and model in the title. Microcurrent sleep aid instrument usb charging intelligent sleep device hypnosis high pressure relief relaxation ing lanyard yellow the product is based on the color or size of the main image of the product page. Colour:lanyard yellow eatures: 1. Provide ces cranial electrotherapy stimulation treatment to apply pulsed low-intensity current to the laogong acupoint in the palm of the hand which will increase the secretion of endorphin in the brain and block the transmission of pain nerves to easily relieve your headache tension anxiety depression fatigue and effectively help reduce sleep disturbances like insomnia and improve overall sleep quality. 2. Mini and handheld device can directly enable safe and painless physical treatment when you hold it staying away from drugs no side effects caused and less patient burden. 3. Adjustable modes and power intensity levels can be switched with user friendly operation you can choose freely according to your demands. 4. Built-in rechargeable 500mah battery can be directly powered only about 1.5 Hours needed for usb charging with high efficiency lightweight and portable design allows you to carry it anywhere and anytime for home and travel use. Specifications: material: abs+stainless steel color:white/yellow/green optional battery capacity: 500mah input voltage: dc 5v/1a working power: 0.5W working current: 1.5-2A charging time: about 1.5H charging interface: micro usb product size: approx. 3.85*4.05*6.85Cm package included: 1* sleep aids ces insomnia device 1* usb cable 1* user manual