$255
40mm (34mm width, 10.7mm depth) and 44mm (38mm width, 10.7mm depth) Always-On Retina LTPO OLED, up to 1000 nits, minimum 2 nits S10 with 64-bit dual-core processor, 4-core Neural Engine 64GB 26.3g (40mm GPS) / 32.9g (44mm GPS) 2nd-gen optical heart sensor, temperature, compass, altimeter, gyroscope, ambient light Up to 18 hours normal use, up to 32 hours in Low Power Mode; fast charge to 80% in ~4