Description Technical details: * Dimensions: 3.96 x 4.04 x 1.19 cm Weight: 4.54gr Displaysize: 1.4 inches Features: 3-axis accelerometer, Optical heart rate monitor, Altimeter, Vibration motor, Relative SpO2 sensor, NFC, Ambient light sensor, Wi-Fi antenna (802.11 b/g/n), Microphone