Bluetooth Version: 5.3 Main Chip: nRF52833 Antenna Type: Ceramic Antenna Transmission Distance: 0~150m GPIOS: 40 Power Supply Voltage (Method): 1.7~5.5V Operating Temperature: -40~105°C Wireless Transmit Power: -20dBm~+8dBm Reprogrammable Firmware: Yes (SWD Interface) Accompanying nRF connect APP: Programmable Firmware/Debugging Supported Systems: Compatible with Mac/Linux/Windows/Android/for iOS Processor: 64 MHz Arm Cortex-M4 Storage: 512KB Flash + 128KB RAM Security Encryption System: 128-bit AES CCM, ECB, AAR Transmission Rate: 2 Mbps/1 Mbps/125 kbps/250 kbps Application Scenarios: IoT/Gaming/Wearable Healthcare/Fitness/Keyboard/Mouse Communication Method: Bluetooth Low Energy/Bluetooth mesh/ NFC/Thread/zigbee/802.15.4/ANT/2.4 GHZ Foreign interface: 12 Mbps full-speed USB 2.0/32 MHz high-speed SPl/ 2xTWISPI,SPI,2XUART/2S,PDM /4XPWM/QDEC/ADC/timer/ counter/real-time counter/DPPl/GPIOTE/Temp senSOr/WDT/RNG Color: Black Material: PCB Package Contents: 1 * nRF52833 Bluetooth Module Only the above package content, other products are not included. Note: Light reflection 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.