There should be 70°C more than 70°C degrees Celsius in the RF circuit board.The Evaluation board type is Transceiver; 802.11 a/b/g/n (Wi-Fi, WiFi, WLAN).
WBSBMVGX4 Features
70°C degrees Celsius Transceiver; 802.11 a/b/g/n (Wi-Fi, WiFi, WLAN) Type
WBSBMVGX4 Applications
There are a lot of Taiyo Yuden WBSBMVGX4 RF Boards applications.