Microcontroller: ESP8266EX
Operating Voltage: 3.3V
Digital I/O Pins: 11 (all I/O pins have interrupt/PWM/I2C/one-wire capability, except for D0)
Analog Input Pins: 1
Flash Memory: 4MB
6. On-Board Switching Power Supply:
Input Voltage Range: 9V to 12V
Output: 5V at 1A Max
Integrated, Wire Antenna
Interoperable with other ZigBee-compliant devices
Programmable versions with onboard microprocessor enable custom ZigBee application development
Supports binding and multicasting for easy integration into a home automation platform
Data Rate: RF 250 Kbps, Serial up to 1 Mbps
Range: Indoor 200 ft (60 m), Outdoor (LOS) 4000 ft (1200 m)
Transmit Power: 3.1 mW (+5 dBm)
Channels: 16 channels