Uxcell Tec1-12703 Thermoelectric Cooler Heat Sink Cooling 12 Volt 18 Watt Product Details 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. 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 Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.