The Panasonic KX-TF400 is a straightforward feature phone designed for those who prioritize essential communication and reliability. It operates on 4G networks with VoLTE support, ensuring clear voice calls, and features a 2.4-inch TFT color display with a resolution of 240 x 320 pixels for easy navigation of its menus. This blue handset is lightweight at 110 g and measures 131.7 mm in height, making it comfortable to carry in a pocket. It utilizes a nano-SIM and includes a microSD or microSDHC slot for expanding storage. For connectivity and utility, the phone is equipped with Bluetooth 5.0, a 0.3 MP camera, and a built-in LED flashlight for quick illumination. Power is provided by a 1000 mAh Lithium-Ion battery that offers up to 5.5 hours of talk time and roughly 8 days of standby. Charging is handled via a modern USB Type-C port. To complete the experience, the device includes a 3.5 mm mini-jack for headphones, which are included in the package along with the charging cable.