NETWORK Technology No cellular connectivity LAUNCH Announced 2014, September. Released 2015, May Status Discontinued BODY Dimensions 38.6 x 33.3 x 10.5 mm (1.52 x 1.31 x 0.41 in) Weight 40 g body (2.72 oz) Build Glass front (Sapphire crystal), ceramic/sapphire crystal back, stainless steel frame SIM No IPX7 water resistant up to 1 meter and 30 minutes DISPLAY Type Retina OLED, 450 nits (peak) Size 1.5 inches Resolution 340 x 272 pixels (~290 ppi density) Protection Sapphire crystal glass 3D Touch display PLATFORM OS watchOS 1.0, upgradable to 4.3.2 Chipset Apple S1 (28 nm) CPU 520 MHz Cortex-A7 GPU PowerVR SGX543 MEMORY Card slot No Internal 8GB 512MB RAM CAMERA No SOUND Loudspeaker Yes 3.5mm jack No COMMS WLAN Wi-Fi 802.11 b/g/n Bluetooth 4.0, LE GPS No NFC Yes Radio No USB No FEATURES Sensors Accelerometer, gyro, heart rate Natural language commands and dictation BATTERY Type Li-Ion 205 mAh (0.78 Wh), non-removable Charging Wireless charging