BEFORE PLACING YOUR ORDER CONTACT US SO WE CAN CONFIRM AVAILABILITY AND OFFER YOU A DISCOUNT CODE. YOU MAY DO THIS VIA CHAT OR EMAIL [email protected] SEND US THE PRODUCT NAME AND WE WILL PROVIDE THE DISCOUNT CODE. WE PREFER CHAT TO GET RESPONSE.If you have back/shoulder pain, chronic pain or muscle pain, try this 4 channel TENS unit muscle stimulator and customize your exclusive massage. Offer 4 programs, 48 massage modes, 20 intensity levels, 6 timer settings and 8 electrode pads. Built in a 300mAh rechargeable battery for up to 7 hours of continuous massage. Feature clear screen and screen lock, easy to read and operate. Smaller than a mobile phone, portable and easy to carry for for on-the-go use. Relax with this electronic pulse massager machine after a busy day. This will be a perfect gift for yourself, lover, friends, colleagues and family!