Wireless & Portable: Enjoy Hot Meals Anywhere Break free from power outlets with this heated lunch box. Enjoy a warm meal anytime—at the office, on the go, or outdoors. Equipped with a high-performance 27000mAh lithium battery , a single full charge supports reliable heating to meet your daily meal warming needs. This self heating lunch box gives you the freedom to take warm meals with you. Core Intelligence: Dual Heating Modes Set-and-Forget Mode (Smart Reservation) This advanced electric lunch box features a built-in clock chip with persistent memory. You only need to calibrate the time once upon first use. After setting your meal time, the heated lunch box will automatically calculate and start heating in advance, ensuring your food is perfectly warm right when you need it. Smart Memory Function: This food warmer saves your last set meal time and temperature. When you power it on next time, the system will automatically load these settings for you, requiring no repeated input for ultimate convenience. Setup Guide: First, calibrate the current time to the actual time, then set your target meal time. Key Reminder: To ensure the reservation works, please make sure to turn on the electric lunch box for adults at least 2 hours before your set meal time to initiate the automatic preheating cycle. Instant-On Mode (Immediate Heating) Plans changed? With one tap, activate the Instant Heating mode to immediately begin heating with this self heating lunch box, perfectly adapting to your unexpected meal schedules. Even Heating & Professional Temperature Control The heating plate reaches a maximum temperature of 220°F (about 104°C) and can be finely adjusted. This food warmer ensures warmth penetrates food evenly from bottom to top, effectively reducing cold spots while locking in moisture and original flavor. Professional Heating Tips Temperature Display: The screen shows the temperature of the heating plate. The core temperature of the food is slightly lower, designed to prevent overheating and preserve optimal taste. Boost Efficiency: Use the included insulation bag to significantly improve heating speed and heat retention for your electric lunch box. Secrets for Even Heating: For drier foods, adding a little water creates steam for more uniform heating in your heated lunch box. Heating starts from the bottom. Please ensure food is in contact with the bottom of the container. For large items, adding a small amount of sauce or water can promote thermal circulation. If more thorough heating is desired, you can moderately increase the temperature or set the reservation time 20-30 minutes earlier. Tip for Frozen Foods: For best results with this lunch box for men and adults, it is recommended to thaw frozen food in the refrigerator overnight before heating. Thoughtful Design: Leak-Proof, Easy Clean & Flexible Leak-Resistant Seal: Designed with a silicone seal ring to prevent leaks during daily commutes and travel. Easy Cleaning: The inner container, removable divider, and utensils are all dishwasher safe, making post-meal cleanup quick and effortless. Flexible Capacity: The spacious 1.6L capacity is perfect as a durable lunch box for men and adults, accommodating a full, satisfying meal. Space Versatility: The divider is fully movable or completely removable, allowing you to customize the compartment layout in this electric lunch box for adults. Safe Materials & Considerate Support Premium Material: The inner container is made of food-grade 304 stainless steel. Important Allergy Notice: The material contains trace amounts of nickel. Not suitable for individuals with a nickel allergy. Low-Temperature Environment Note: To prevent temperature sensor reading errors, please avoid powering on or storing the unit in extremely low-temperature environments. Troubleshooting Guide – Error Code E1 Quick self?repair – follow these 4 simple steps: Remove & open: Remove the four screws, then pry open the left and right clips. Disconnect battery: Remove the battery cover, pull out the battery connector and disconnect it completely. Discharge key: With the screen black, press the power button several times. Reassemble: Put the device back together – repair complete. Note: This operation involves disassembly. Please proceed with caution. If unsure, contact official customer service for guidance. Manufacturer Contact Information 1-833-EAST-OAK (USA) 1-833-327-8625 Mon-Fri: 9:00 am - 5:00 pm PST/PDT