Product Model: U13
APP: Hband
Main Control Chip: JL7013A + External 128M Flash
Gsensor: Xichuang ST8321
Heart Rate Sensor: Tianyihexing 3602
Vibration Reminder: Motor vibration reminder
Encoder: Full-code encoder
Waterproof Rating: IP67
Screen Size: 2.1-inch square screen, Resolution: 320*386 (high color gamut)
Screen Type: IPS screen
Bluetooth: Bluetooth 5.3
Strap Material: Standard: Silicone strap
Head Unit Size: 54.85*42.32*13.1mm
Recommended Maximum Size of Protective Film: 45.61*37.16mm
Thickness: 13.1mm (including heart rate sensor area)
Overall Machine Size: 269*39.67mm (maximum size including strap)
Head Unit Weight: 34g
Overall Watch Weight: 52g
Colors: Black, Gold
Operation Method: Full touch + rotating button
Battery: Polymer lithium-ion battery
Capacity: 3.8V/300mAh
Usage Time: 4 days for heavy use, 12 days for light use, Standby: 30 days, Call/Music Playback: 6 hours
Charging Method: Magnetic charging
Charging Time: 2 hours (regular)

Major function:

24/7 heart rate, blood pressure, blood glucose, blood oxygen, body temperature, MET testing; calling, step counting, sleep monitoring, calorie calculation, distance tracking, voice assistant; music playback, stopwatch, countdown, calculator; weather display, female menstrual cycle function; remote photography, wrist lift to wake screen; find phone; incoming call reminder (with caller ID/name); message reminder, alarm reminder, sedentary reminder, heart rate alarm reminder; Bluetooth disconnection reminder (requires APP activation); games, flashlight, breathing training; language settings, time and date settings; multiple watch faces: 8 default watch faces + 1 custom watch face + 1 massive watch face library