SparkFun ESP8266 Thing All module pins broken out, On-board LiPo charger/power supply 802.11 b/g/n, Wi-Fi Direct (P2P), soft-AP Integrated TCP/IP protocol stack ntegrated TR switch, balun, LNA, power amplifier and matching network, Integrated PLLs, regulators, DCXO and power management units, Integrated low power 32-bit CPU could be used as application processor +19.5dBm output power in 802.11b mode