Have a happy shopping! Detailed Description: Chip:JL AC6958 Touch Type:COB Full Touch Interaction Display:1.68" Resolution:240*280 Encoder:Mechanical encoders Number of keys:Three buttons 1 s more→ide button, 1 encoder, 1 motion button Bluetooth:5.0+4.2 Dual mode with Bluetooth, Bluetooth call Heart rate sensor:Heart rate, Blood pressure, Blood oxygen Charging mode:2PIN Recharge Stand Waterproof:Waterpro of life Waterproof Product size:45.5*39*12.5mm Battery:150mAh Endurance time:3-7 Days Appearance Material:Metal Housing Bracelet Menu Language:Software language: Chinese, English, French, German, Russian, Italian, Spanish, Portuguese, Thai, Turkish, Arabic, Hindi, etc