Raytac Corporation
A BT4.1 & BT4.2 module maker based on Nordic nRF51 & nRF52 solution
(nRF51822 & nRF51422 & nRF52832 & nRF51802)
Tel: +886.2.3234.0208 email: service@raytac.com
MDBT40 series module is small, but MDBT42 makes the definition of MDBT40 become bigger!

Bluetooth GPIO Dimension
MDBT40 BT4.1 31 18.0 x 10 x 2.7
MDBT42 BT4.2 32 13.8 x 8.8 x 1.9
MDBT42Q BT4.2 32 16.0 x 10.0 x 2.2