The Bluetooth module is based on Nordic nRF52832 Soc , The nRF52832 SoC is a powerful, highly flexible ultra-low power multiprotocol SoC ideally suited for Bluetooth low energy (previously called Bluetooth Smart), ANT and 2.4GHz ultra low-power wireless applications. The nRF52832 SoC is built around a 32-bit ARM -M4F CPU with 512kB + 64kB RAM. The embedded 2.4GHz transceiver supports Bluetooth low energy, ANT and proprietary 2.4 GHz protocol stack. It is on air compatible with the nRF51 Series, nRF24L and nRF24AP Series products from Nordic Semiconductor. Processing power Multiprotocol radio(bluetooth low energy,ANT,2.4G proprietary) Power efficiency WLCSP Hardware module : SWD programmer (SWDIO,SWCLK,,GND) nRF52832 WLCSP Size :9.4 x 9.25mm stack & RF 2.4Ghz type: Bluetooth Module color:Black Material:PCB size:9.4 x 9.25 x 2MM Package Contents: 1 x Bluetooth Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.