In the last batch of products, we found that some defective connectors were used, resulting in poor connections. We are so sorry for this problem and we have asked the manufacturer to strictly test all connectors before assembly to ensure that each connector is up to standard. Please rest assured to purchase. We are also launching a buy-one-get-one-free promotion offering two extra pairs of spare connectors for replacement when the connectors age out. <br />Please feel free to contact us directly via amazon if you need help. <br /><br /><b>COOLMAN ice therapy machine is better than traditional ice packs: </b><br /><br /><b>1. LOWER RISK: </b> <br />Traditional ice packs might be too cold that may cause cold injury. The cold water flow rate of COOLMAN can be adjust to keep a comfortable temperature, reduce the risk. <br /><b>2. MORE COMFORTABLE:</b> <br />The flexible cold pad is soft and does not contain hard ice. <br /><b>3. MORE CONVENIENT:</b> <br />High capacity water bucket allow users to store more ice for multiple cold therapy, instead of getting ice packs from the fridge every time. <br /><b>4. MORE PORTABLE:</b> <br />Users can take the device with them and keep it cold for hours. <br /><b>5. MORE APPLICABILITY:</b> <br />The flat soft elastic therapy pad can be bent into many shapes. with elastic bandages, It can be perfectly wrapped around any body part. <br /><br /> <b>Warranty:</b> We will provide free merchandise exchange service if any malfunctions(non-human) occur within ONE year of purchase. <br />Please feel free to contact us directly via amazon if you need help. <br /><br /><b>Package content:</b><br />Cold therapy machine *1<br />Universal cold therapy pack *1<br />Insulated circulating water tube *1<br />Elastic bandages *3<br />DC 12V power adapter *1<br />Nonwoven barrier *1<br />Product User Manual *1 <br />Back-up connectors *2