Power source
DC 3.7 V: Built-in lithium-ion rechargeable battery
DC 5 V: When charged using USB
Operating temperature range
5°C — 40°C
Dimensions (w/h/d)
Approx. 110 mm × 45 mm × 160 mm (when the unit and the air vent cover (short) are attached to the neckband, including the band)
Approx. 53 mm × 24 mm × 119 mm (unit only)
Mass
Approx. 165 g (when the unit and the air vent cover (short) are attached to the neckband)
Approx. 125 g (unit only)
Communication specification
Communication system:
Bluetooth 5.0 Low Energy
Output:
Bluetooth Specification Power Class 2
Frequency band:
2.4 GHz band (2.4000 GHz — 2.4835 GHz)
External interface
USB Type-C®
System requirements for battery charge using USB
USB AC adaptor
A commercially available USB AC adaptor (USB-C®) capable of supplying an output current of 1 A (1000 mA) or more