Perfect for -Compatible! Based on ASR6052 and SX1262; LoRaWAN 1.0.2 support; Ultra low power design, 50uA in deep sleep; Onboard solar energy management system, can directly connect with a 5.5~7V solar panel; Onboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB / battery power automatic switching) Micro-USB interface with complete ESD protection, short circuit protection, RF shielding, and other protection measures Integrated CP2102 USB to serial port chip, convenient for program downloading, debugging information printing Good impedance matching and long communication distance Use Air530 GPS module, GPS / Beidou Dual-mode position system support; Onboard 0.96-inch 128 x 64 dot matrix OLED display, which can be used to display debugging information, battery power, and other information. MCU:ASR6502 (48 MHz ARM M0+ MCU, 128KB FLASH, 16KB ) LoRa Chip:ASR6502 (Internal assembled Semtech LoRa Transceiver SX1262) LoRa working band:EU_433 LoRa maximum output power:22 +/- 1dB : UART x 2; SPI x 1; I2C x 1; SWD x 1; ADCx 3; COMP x 1 12 - bits ADC; 8 - channel DMA engine 14 x GPIO FLASH:128KB internal FLASH Interface:Micro-USB x 1; LoRa (IPEX) x 1 Size:55.9 x 27.9 x 9.5 mm USB-UART bridge :CP2102 Battery Type: 3.7V Lithium(Battery not include) (SH1.25 x 2 socket) Low power design Deep Sleep :3.5uA GPS: GPS antenna has been built in, and a GPS antenna interface is also provided. You can purchase a GPS antenna yourself Note: Pin header no welding. colour: black Material: PCB+metal Package Contents: 1 x Development board 2 x Headers 1 x 433MHz Antenna Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.