Modern small enclosure specifically designed for "wearable technologies". Three-part design consisting of highly polished top and bottom parts and a matt TPV sealing ring. 
Recessed area in top for locating a membrane keyboard or decor foil.
Location bars for a PCB are provided in the top part; after assembly of the enclosure the PCB is then held securely between the top and bottom parts. Internal power supply with round or button cells on the PCB, or alternatively, the use of a rechargeable battery with charging coil for charging the device inductively.
Wrist strap, fastening kit, lanyard etc. as accessories.

With recess

Top and bottom parts, sealing ring, 4 M2 x 6 mm enclosure screws (T6), 2 spring bars (18 mm)