Thermoelectric Cooler Heat Sink Cooling Peltier 12 Volt 18 Watt By, 12703. Specifications: Model: TEC1-12703 Voltage: 12V Umax (V): 15.5V Max Current (A): 3A Cooling Power: Qcmax 18W Resistance: 4.0-4.3? ?Tmax(Qc=0): up to 60C Operates Temperature: -55C to 83C Power Cord: 29cm Dimensions : 40mm x 40mm x 4.2mm (L*W*T) Package Content: 1 x Thermoelectric Cooler Description: 1.Get ice cold in minutes or heat to boiling by simply reversing the polarity. 2.Used for numerous applications from CPU coolers to alternate power sources. 3.Since they consist primarily of semiconductor material sandwiched between ceramic plates and have no moving parts. 4.Must be used in conjunction with a heat sink to avoid burned. Hot side needs heat sink all the time. Please Note: 1.Under cooling mode: Red wire to positive, black wire to negative. the surface with model number is cooling side. 2.When heating, just need to change the current polarity; when cooling, switching power supply is needed. 3.During installation, keep thermoelectric cooler clean, and apply the heat-conducting silicone grease evenly over both heating and cooling surfaces. Product Features Model : TEC1-12703 Voltage(V): 12V; Umax (V): 15.5V; Max Current (A): 3A QMax (W) : 18W; Resistance: 4.0-4.3? Dimensions : 40mm x 40mm x 4.2mm Thermoelectric Cooler Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!