A BT4.0 module maker based on Nordic nRF51822 & nRF51422 solution
No need further description, you may quickly understand how small it is.
Nano Size: 8mm x 8.6mm
No antenna and shielding case attached.
(Raytac can help customer to design the printed antenna in order to remain high performance of RF)
Mini Size: 8mm x 12 mm
It equipped the chip antenna, no shielding case attached