Multiple Use & After -Sale Service: The Electronic Acupuncture Pen comes with 3 replaceable massage heads. For face by using the biggest round shape head.For ears by using the small head.We aim to provide the best service possible to our customers. If there is any problem with the product, please do NOT hesitate to and we will offer 100% satisfaction after the sale.Portable, Rechargeable & Wireless: Meridian Pen is wireless and rechargeable. Compact and lightweight, you can easily put the small acupuncture massage pen in your pocket, handbag, backpack, or pouch if you're traveling or perhaps just going to work for a whole day and need relief from pain. Effective in relieving acute and chronic physical pain caused by arthritis, muscle, joint, or back pain. Simple to use and easy to carry.How to use it?(Important Steps): If the skin is dry,the device will not work!!!you need take some gel,cream or lotion on the skin before use. Introduction of various settings to adjust the device: (varying to different skin) Hz knob:Knob'Hz' to biggest value. SEN knob: 2 (If you set 'SEN' to 2 there is no beeps and light no flash,please knob'SEN' higher step by step.to reach a continuous beep sound and the light is flashing( 2 times beeps per second is nice).if the sensitivity settings too high will result in inaccurate detection. ON/OFF/ INT: 4 ('INT' knob set higher, the more Shock feeling you will get.It is better to set the Intensity step by step.)10 Intensity & 10 Sensitivity: This therapy pen has 10 intensity adjustment (0-off, 1-weakest, 10-strongest). You can adjust the Acupuncture Pen to the proper level of energy based on different treatment needs by simply choosing the different intensity. There are 10 sensitivities which can be adjusted according to personal skin situation.Acupuncture Pen It is recommended to begin at intensity level 1 adjust the intensity level as needed.No Needles & Easy to Use: Simply press the massage tools on the affected area, and it will release a proper pulse to the meridian and acupuncture points, improving blood circulation. There are no needles needed so it is not only painless but the skin is never even punctured at all, making it safe to use at home. Come with a user manual that has several charts about the body's therapeutic acupoints showing where to use the massage pen.