Features 1 Built in latest Ver1 4 6 firmware2 Adopt 3D shell design3 Built in card slot burning interface4 Built in 800mah rechargeable lithium batteryParameters Firmware version Ver1 4 6 Note The firmware version is not fixed In the future the updated firmware will be built in with the release of new firmware Currently it is Ver1 4 6 Body size 9cm 5 8cm 1 5cmScreen size 2 8 inchesAntenna length about 13 5cmApplicable scope 2 4GhzWiFi Bluetooth GPS detection etc Battery 800mAhCharging time 1 2 hoursSpecifications of external antenna GPS antenna is 20dBi active 13 5cm antenna2 4G antenna is 8dBi 16cm antennaPackage includes 1 x ESP32 development board2 x Antenna