Sony AKA-WM1

Specifications
Sony AKA-WM1
GeneralCompatible
Dimension
Weight
Color
Circumference
All Sony models
W 3.94in x H x 2.48in x D 0.8in (W 100 mm×H 63 mm×D 21 mm)
1.3oz (37g)
Black
5.51 in – 9.45 in (14 cm – 24 cm)
Features
Shoot from the wrist
Comfortable fit
In the box                          

Image: https://www.sony.com/e