TDK SESUB-PAN-T2541 Bluetooth® v4.0 modules are ultra-compact Bluetooth low energy modules in a 4.6x5.6x1.0mm footprint. The SESUB-PAN-T2541 is based on TDKs proprietary SESUB technology (semiconductor embedded in substrate) and is suited for use in wearable devices. The Bluetooth die is embedded into a thin substrate along with a quartz resonator, bandpass filter, and capacitors. The module needs only a power supply and antenna. The Bluetooth v4.0 LE specifications significantly reduce power consumption of battery powered devices, and are ideal for wireless heathcare, sport, fitness, home entertainment, and wearable devices.