Payment Policy                                 We only accept payments via PayPal.  All payments must be prepaid, Description:   : 50A 70A 90A 120A 150A Brushless ESC Water Cooling Speed Control BEC Boat #1667 : quantity : 1PC Water Cooling :  Aluminum alloy Aluminum alloy  shell  waterproof Has been completed Voltage range, #1 , 50A  SW050006     Apply to boat length :<55cm 50A   2S-6S / BEC : 5V/5A / size :57*49*18 / weight : 90g Peak current : 300A   #2 , 70A  SW070006   Apply to boat length :<70cm 70A   2S-6S / BEC : 5.5V/5A / size :57*49*18 / weight : 101g Peak current :420A #3 , 90A  SW090006   Apply to boat length :<100cm 90A   2S-6S / BEC : 5.5V/5A / size :57*49*18 / weight : 102g Peak current : 540A #4 , 120A  SW0120006    Apply to boat length :<120cm 120A   2S-6S / BEC : 5.5V/5A / size :76*56*25 / weight : 155g Peak current : 720A #5 , 150A    SW0150006   Apply to boat length :<135cm 150A   2S-6S / BEC : 5.5V/5A / size :76*56*25 / weight : 169g Peak current : 900A refund If there is any problem when you receive your parcel, please contact us without hesitate in 3 days. If you are not 100% satisfied with your purchase, simply return the unworn item within 30 days of the item ship date and we will gladly exchange, replace， or refund it inclusive of delivery charges. (All refund should be sent back by our paypal account) Shipping Time & Method:    United States : item transport to the U.S.We use accelerate transportation express.usually 7 to 15 working days.Remote areas will delay the transportation time 20 Working days.Each item have tracking number. worldwide : Item will be shipped within 3 days after payment is cleared.Goods will be sent via airmail . Delivery takes about 25-30 business day (without holiday). All products have been checked and packaged in good condition before dispatch.                                                                                         Tracking number : Your purchase amount more than $18,Then you will get a free items tracking number.( If you shopping amount not reached $18. You can also buy tracking number ,Cost $3 ) Address : Please make sure your address in Ebay is matched with your shipping address before pay. If you would like to change the address, please contact us IMMEDIATELY after your payment.  About Us   Your satisfaction is our first priority. Defective product will be offered exchange or refund. 100% Money back Guarantee. We appreciate your positive feedback. Our system will leave feedback automatically after you pay it. Please leave us positive feedback upon satisfaction of the item. Please email us before leaving negative and neutral feedback. We will try our best to solve the issue.  We will be glad to answer any question you may have, please feel free to contact us at: we do try respond as quickly as possible. Due to time zone difference, please allow 12~24 hours to get your mail replied.