Embarcase is a mobile phone case designed for iPhone, but it is also a hand warmer. Made of titanium alloy, it has a built-in ultra-thin lithium battery and an independent micro circuit board. It can be connected to the mobile phone via Bluetooth, and the heating temperature of the shell can be adjusted using the accompanying application. In the cold winter, let you warm your hands while playing with your mobile phone. There is a layer of ceramic airgel fiber between the phone case and the phone to insulate it and prevent heat from being transmitted to the phone.