Description: Working voltage: 1.8~3.7V Acceptable current: 10~14mA Transmit current: 120mA@+20dBm 90mA@+17dBm 29mA@+13dBm Operating frequency: 868MHz Transmit power: +20dBm Receive sensitivity: -139dBm@LoRa &62.5Khz&SF=12&146bps -136dBm@LoRa &125Khz&SF=12&293bps -118dBm@LoRa &125Khz&SF=6&9380bps -123dBm@FSK&5Khz&1.2Kbps Frequency error: +/-15KHz FIFO space: 64Byte Data rate: 1.2K~300Kbps@FSK 0.018K~37.5Kbps@LoRa Modulation Mode: FSK, GFSK, MSK, GMSK, LoRa TM, OOK Interface form: SPI Sleep current: 0.2uA@SLEEP 1.5uA@IDLE Operatingtemperature: -40- +85 Digital RSSI function Automatic frequency correction Automatic gain control RF wake-up function Low voltage detection and temperature sensor Fast wake-up and frequency hopping Highly configurable data packet handler SMA Antenna IP5306 More product information, go to: https://github.com/LilyGO/TTGO-LoRa32-V2.1 At the TTGO LoRa V2.1, we add the SMA and IP5306 to the board, which make it can do more things. In terms of the power switch, we have changed the switching interaction mode. The added SMA antenna can enhance signal transmission. Package included: 1 x TTGO LoRa32 V2.1 868Mhz Module 2 x Pin 1 x Antenna 1 x Power Cable (Notice:The shipping list does not include battery and SD card) About the lipo charging circuit problem (Important update in 10th September 2018): After V2.1-1.5 was upgraded to V2.1-1.6, after our tests, the diode components should be used on the charging circuit, but we used a fuse, the diode is unidirectional, and the fuse is bidirectional. This causes the USB voltage to pass directly to the battery. After a long woking time, the battery may become hot or burn, so you cannot use this V2.1-1.6 version to charge the battery. . . (Battery can be used, but the battery cannot be charged) If you want to use this V2.1-1.6 version to charge the battery, you need to replace the fuse in the figure with a diode (Type: BS5819 SOD123 1A) to use the charging function normally. The following is an upgraded picture.