This fits your .
Requires iOS 7.1 & later or Android 4.4 & later, BT4.0 & later
Smartphone only, NOT compatible with PC, iPad or tablets.
IP67 water resistant, sweat-proof, rain-proof, but do NOT wear it when showering or swimming.
Sleep Tracking: Automatically tracks your sleep duration and consistency with comprehensive analysis of sleep quality data.
Call, SMS & SNS Reminder: Receive call, calendar, SMS and SNS (Facebook, WhatsApp, LinkedIn, Instagram, and Twitter) notifications on display.
Alarms: Set alarms to wake you up or remind yourself of important dates.
Built-in USB Plug: Easy to charge with any USB block and computer; no charging cable and dock needed. One full charge gives you up to 7 days of battery life.
Model: ID115U HR
BT Connection Range: 10 meters (32.8 ft.)
MCU: Nordic nRF51822QFAC
Heart Rate Sensor: Silicon labsSill42
Battery Capacity and Battery Type: 45mAh Polymer Rechargeable Li Battery
Charging Time: 1-2 hours
Working Time: about 7 days
Product Weight: 0.63oz/18g
Material: host: PC; bands: TPE
Working Voltage: 3.7V
Screen Size: 0.86" OLED screen
Letsfit Fitness Tracker Slim Activity Tracker with Heart Rate Monitor Pedometer Watch Sleep Monitor Step Counter Calorie Counter Waterproof Fitness Band for Kids Women and Men - B07FS6Q1KH