FEEL THE WARMTH IN SECONDS:Meet the Ocoopa Octo-HeatLock Heating Pad, the First-of-its-kind innovation that's changing the game. With an exclusive 8-layer structure combining cutting-edge Graphene and Lithermo cotton, quickly heats up to 123.8 ℉ / 51 ℃ within 10 minutes. It heats on one side while locking in warmth on the other, delivering heat 50% faster than traditional pads(at 50 W power 25 °C indoors). This truly provides rapid and effective relief for your back or neck and shoulder pain.6 HEAT LEVELS FOR TAILORED COMFORT: Supports 6-level temperature control (104 - 140 ℉ / 40 °C - 60 °C) and 6-level timer settings (0.5 - 6 hours). The revolutionary 8-layer design is not just a feature—it's a breakthrough, ensuring the set temperature perfectly matches what you feel. This heating pad for lower back is like having a personal heat therapist that adapts to your needs, providing the ultimate heat therapy experience for your neck, shoulders and back.EVEN AND RELIABLE WARMTH: The Ocoopa electric heating pad for back pain relief ensures even heating across all areas of the pad. With temperature differences kept within 37.4℉ (3℃), heating pad for neck, shouler and knee delivers a more professional pain relief experience. You'll feel the soothing effects across every inch, with no hot spots or cold patches, just pure, reliable comfort.OCTO-HEATLOCK TECHNOLOGY: The 12 * 24 inch king size can easily conforms to your body, ensuring no heat is wasted for a more long-lasting warmth experience. Our tests show it retains heat 34.78% better than traditional heating pads after power-off (at 25℃ indoors). This isn’t just another heating pad—it’s the future of comfort. Our back heating pad for women and men is the first-ever heating pad to use Graphene technology, wrapped in a soft Microplush surface.SAFE AND DURABLE: This large heating pad for period cramps automatically adjusts to 40°C after 2 hours for safety and comfort. The heating wire can operate for 5000 hours under normal use and adopt NTC+PTC overheat protection technology.LOVE AND WARMTH GIFT: Looking for the perfect gift to show your love and appreciation? Our heatlock heating pad makes an ideal gift for men and women. Whether it's for him, her, mom, dad, husband, wife or grandparents, this thoughtful gift is perfect for any occasion. It’s a wonderful choice for Thanksgiving, Christmas, New Year, Birthdays and Anniversaries, etc.