EASY PLUG AND PLAY - Just connect directly to cigarette lighter by adapter cable when using and general base size less than 2.75 " for most cars HEATING AND COOLING - Keep your beverage cool or coffee hot in 10 minutes. Two press buttons, red LED light for HOT mode , heats up to 140℉, blue one for COLD mode , coolest at 21℉ SAFE PROTECTION SYSTEM - Pass the ROHS Certificate. And it will be automatic shutdown to protect the car battery when Voltage < 10.5 V APPLICATION - Enjoy your cold beverage in summer or hot coffee in winter, whether traveling, working or outdoors Warning: Specification1. Product Dimension: 3.93 x 3.93 x 6.69 inches/ 16.0 x 10.0 x 10.0cm2. Shipping Dimension: 4.13 x 3.93 x 6.69 inches/ 10.4 x 10 x 17 cm3. Product Weight: 0.93 pounds/ 425 g4. Shipping Weight: 1.11 pounds/ 504 g5. Voltage/Power: DC 12V/36W6. Cable Length: 40.15 inches / 102 cm7. Certified by RoHS, CE8. Noise: < 53 dbIntelligent Protection1. Overcurrent protection2. Over temperature protection3. Auto short circuit protection 4. Overvoltage protectionPacking Included1 x User Manual1 x Car cup heater/cooler1 x Cigarette Lighter charge