Features: Support wireless 802.11b /g/n standard Supports three working modes: STA/AP/STA+AP The built-in TCP/IP protocol stack supports multiple TCP Client connections Supports rich Socket AT instructions Supports UART/GPIO data communication interface Supports Smart Link Smart networking The built-in 32-bit MCU can double as application processor Low energy consumption, suitable for battery power supply applications Specification: Wireless Standard: 802.11b/g/n Frequency Range: 2.4GHz-2.5GHz(2400M-2483.5M) Data Interface: UART/HSPI/I2C/I2S/Ir Remote Control/GPIO/PWM Operating Voltage: 3.0-3.6V(We recommended 3.3V) Operating Current: Average 80mA Operating Temperature: -40~125℃ Wireless Network Mode: station/softAP/SoftAP+station Safety Mode: WPA/WPA2 Encryption Type: WEP/TKIP/AES Network Protocol: IPV4,TCP/UDP/HTTP/FTP Size: 2.5*1.5cm/1*0.6in Weight: Approx.4g/0.1oz Package list: 1 x ESP8266 ESP-01S Module 1、Support wireless 802.11b /g/n standard 2、Supports three working modes: STA/AP/STA+AP 3、The built-in TCP/IP protocol stack supports multiple TCP Client connections 4、Supports rich Socket AT instructions 5、Supports UART/GPIO data communication interface