The SESUB-PAN-D14580 from TDK is a Bluetooth V4.1 Smart Single Mode Module that is built for wearable devices. It is available in space saving ultra-small package that measures 3.5 x 3.5 x 1.0 mm. This module consumes very low power with a current consumption of 5 mA when transmitting and 5.4 mA with receiving with 0. 8 A in standby mode based on a 3 V supply. It is based on the DA14580 IC from Dialog Semiconductor.