Micro current pulse massage Beneficial for eye blood load, fatigue relief, fine line and wrinkle thinning, and black circle reduction. Middle button: 1. Long press for power on/off. 2. When the device is turned on, the device will automatically enter the first vibration device. 3. Short press enters once into the second vibration gear. (with 2 beep voice) 4. Short press enters the third vibration gear twice. (with 3 beep voice) 5. Short press three times will turn off the vibration function. Left button: 1. Short press enters once into the first temperature gear. (with 1 beep voice) 2. Short press enters the second temperature gear twice. (with 2 beep voice) 3. Short presses of three times enters the third temperature gear. (with 3 beep voice) 4. SHORT press four times will turn off the heating function. Right button: 1. Short press enters once into the first pulse gear. (with 1 beep voice) 2. Short press enters the second pulse gear twice. (with 2 beep voice) 3. Short presses of three times enter the third pulse gear. (with 3 beep voice) 4. SHORT press four times, the pulse function is turned off. Specification: Material: abs. Power supply: USB Voltage: DC5V . Battery capacity: 350mAh Mode: 3. Charging time: Approx. 3 hours Using time: 2.5- 4 hours USB Cable Length: 455cm Item Size (unfolded): 14.7x14.2cm Package Contents: 1 x main unit 1 x USB. Vibration massage High frequent vibration of 5000 per minute improves blood circulation around the eyes, activates eye muscles and relieves eyes. Ergonomic 3D DesignA unique 3D shape fits the eyes perfectly, it exercises better, eye muscle exercises, ensure more efficient enjoyment. 3 Modes and 3 GearsWith 3 modes, each mode designed with 3 gears. Meet different massage needs of different groups of people. Portable and ConvenientUSB fast charging with large built-in battery can ensure the massager 2.5-4 hours using time. Efficient in relieving eyestrain, promoting blood circulation, cranial nerve regeneration and improving sleep quality and condition.