This module uses the newest 2.4GHz transceiver from Nordic Semiconductor, the nRF24L01+.This transceiver IC operates in the 2.4GHz band and has many new features! Take all the coolness of the nRF2401+ and add some extra pipelines, buffers, and an auto-retransmit feature.
LoRa™ modem
• Support FSK, GFSK, MSK, GMSK, LoRa™ and OOK modulation methods
• Support frequency band 410MHz~525MHz
• Working voltage is 3.3V, maximum output +20dBm, maximum working current is 105mA
• Low power in receiving state Power consumption characteristics, the receiving current is 12.15mA, the standby current is 1.6mA
• High sensitivity: as low as -140dBm
• Small size dual-row stamp hole patch package
• The module adopts SPI interface, uses half-duplex communication, with CRC, up to 256 words Packet engine
ESP8266 is a highly integrated chip designed for the needs of a new connected world. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host the application or to offload all Wi-Fi networking functions from another application processor.
The smallest 802.11b/g/n Wi-Fi SOC module
Low power 32-bit CPU, can also serve as the application processor
Up to 160MHz clock speed
Built-in 10 bit high precision ADC
Supports UART/GPIO/IIC/PWM/ADC
SMD-22 package for easy welding
Integrated Wi-Fi MAC/BB/RF/PA/LNA
Support multiple sleep patterns. Deep sleep current as low as 20uA
UART baud rate up to 4Mbps
Embedded LWIP protocol stack
Supports STA/AP/STA + AP operation mode
Support Smart Config/AirKiss technology
Supports remote firmware upgrade (FOTA)
General AT commands can be used quickly
Support for the two development, integration of windows, Linux development environment Ai-T
Note: SONOFF DW2 doesn’t come with batteries into the package.
ESP8266 offers a complete and self-contained Wi-Fi networking solution, allowing it to either host the application or to offload all Wi-Fi networking functions from another application processor. Perfect and simple AT commands.
SONOFF Zigbee 3.0 USB Dongle Plus–ZBDongle-E 
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