Release year:   2018
Network: GPS or GPS + Cellular (LTE/4G)
Material:

Aluminum - Glass front, ceramic/sapphire glass back, aluminum frame
Stainless steel - Glass front (Sapphire glass), ceramic/sapphire glass back, stainless steel frame

Screen: 40 mm
1,57” Retina LTPO OLED, 1000 nits (peak)
394 x 324 pixels (~326 ppi density)
Ion-X reinforced glass

44 mm
1,78” Retina LTPO OLED, 1000 nits (peak)
448 x 368 pixels (~326 ppi density)
Ion-X reinforced glass
Processor: Apple S4
Dual core
PowerVR
Remind: 16GB 1GB RAM
Bacteria: Li-Ion 292 mAh (1,12 Wh), non-removable
Wireless
Other: Accelerometer, gyro, pulse, barometer Wi-Fi 802.11 b/g/n
Bluetooth 5.0
NFC
eSIM
Measure: 40mm – 4cm x 3,4cm x 1,07cm
44mm – 4,4cm x 3,8cm x 1,07cm
Weight:

Aluminium 
40mm 30g
44mm 36,7g

Stainless steel
40mm 40g
44mm 48g