Features: 1. Module Body ESP-WROOM-32 Module, 2. The Usb To Serial Port Chip Cp2102 Is Used Peripherally To Extend The Micro-usb Interface, Which Can Be Directly Connected To The Computer Via Usb For Debugging. 3. Data Transmission Is Fast And Stable. 4. Adopts A Of Wifi & Bluetooth Dual-Mode Dual-Core Wireless Communication Module, Which Integrates Bluetooth 4.2 And Wifi Transmission. 5. This Module Is Equipped With An 18650 Battery Holder, Which Can Be Powered By The Battery Or Charge The Battery, And Is Equipped With A Temperature And Humidity Sensor.<br><br>Description: 1. Power Supply Voltage: DC3.6V~5V (Micro-Usb Port 5v Input) 2. 18650 Battery Holder And Integrated Carp Battery Charging And Discharging Circuit 3. The Module Can Work While Charging The Battery 4. Wi-Fi Protocol: 802.11 B/G/D/E/I/K/R (802.11N, To 150 Mbps), A-Mpdu And A-Msdu Aggregation, Support 0.4us Protection Interval 5. Wi-Fi Standards: FCC//Telec/KCC 6. Frequency Range: 2.4-2.5 GHZ 7. Bluetooth Protocol: Complies With Bluetooth V4.2 BR/ And BLE Standards 8. Bluetooth Audio: CVSD And Audio 9. Temperature And Humidity Sensor 10. Red, Green And Blue Indicator Lights Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Material: PCB colour: As Shown<br><br>Package Contents: 2 x Soil Temperature And Humidity Module<br><br>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.