Microchip MRF24WB0MB/RM
Microchip MRF24WB0MB/RM, Included Features: Low Data-Rate Wi-Fi, Supports Low-Power, Supported Network Interfaces: 802.11, Supported Bus Interfaces: SPI, Supply Voltage: 3.3V, Dimensions: 21 x 31 x 3.7mm, Length: 31mm, Maximum Operating Temperature: +70 °C, Width: 21mm