AUVON Dual Channel TENS Unit Muscle Stimulator Machine with 20 Modes, 2" and 2"x4" TENS Unit Electrode Pads Pain Relief Machine: The rechargeable electric muscle massager can stimulate the sensory nerves and muscles, activate specific natural pain gate mechanisms, relax your body and have pain management anytime you feel the need Up to 20 Modes: Pre-set modes offer you hammering, kneading, shiatsu, and more choices to help relieve pain associated with aching and fatigued muscles in the shoulder, lower back, and knee from exercise, normal household or work activities Independent Mode Control: You can set separate modes and intensities for channel A and channel B. For example, you could choose Acupuncture mode in channel A with an intensity level of 5 for your shoulder. While in channel B, the Tapping mode is being run with the intensity set to level 12 on your lower back as a back electric stimulator Industry-leading TENS Pads: The included electrode pads can provide excellent self-stick performance for up to 45 uses. The shaped 2" TENS electrodes are recommended for more compact pain areas like the knees or elbows. Meanwhile, the bigger 2"x4" reusable patches are perfect for larger areas such as the back for TENS pain relief What You Receive: 1 x Dual Channel TENS Machine, 4 x 2" Square Electrode Pads, 4 x Large Rectangle 2"x4" Pads, 2 x Lead Wires, 1 x USB Cable, 1 x USB Charger,1 x User Manual, 1 x Pad Holder, 1 x Pouch, our 24-month warranty and technical support and friendly customer service (4pcs 2x2 pads are in a pack while 2pcs 2x4 pads are in a pack. Please open the sealed bag firstly and unfold each pads pack before counting the pads quantity.) Shipping We offer FREE shipping on all orders in US We ship within One-Three business days of payment, usually sooner. We use a selection of shipping services such as UPS, FedEx, USPS etc We offer free shipping to the lower 48 states and ship within 1-3 days of payment, usually sooner. For shipping outside of the continental USA International customers are responsible for all duties and taxes. Return You can return a product for up to 30 days from the date you purchased it. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. Return Policy ? We guarantee against any defective or misrepresented products. The original shipping label must be sent back to us to validate the return. A full refund can only be issued during the first 30 days upon receipt of the product. ? Returns will be voided if the product is mishandled or physical damaged by customer. ? Buyer will be responsible for all kind of return shipping/shipment to the seller for resolving the problem. ? Returns made for all non-defective, undamaged products are subject to a 15% restocking fee. Shipping and handling fees are absolutely non-refundable. If an item is returned to us due to an address issue, we do charge a reshipping fee to reship. If you would like a refund, there will be a 15% restocking fee applied. ? All returned products need to be assigned an RMA # (Return Merchandise Authorization #) prior to return. Please contact us through's messaging system to obtain an RMA# for the return. Any returned product without an RMA # on package will not be accepted or processed? Please contact us before returning. Payment We accept payment by any of the following methods Please pay as soon as possible after winning an sale, as that will allow us to post your item to you sooner! Feedback Customer satisfaction is very important to us. If you have any problem with your order, please contact us and we will do our best to make you satisfied. Feedback ? We appreciate your feedback and our system will automatically leave feedback for you after bid ends. ? Please contact us through message center if you have any problems, we will always try our best for 100% customer satisfaction. Contact Us If you have any queries, please contact us via. We usually respond within 24 hours on weekdays. Please visit our store to check out other items for sale! Thank you for shopping at our store.