Bluetooth chip: AD6973
Bluetooth version: V5.3
Sound channel system: true stereo
Working frequency: 2.402-2.480GHz
Supporting protocols: HSP, HFP, A2DP, AVRCP
Transmission distance: 10 meters
Transmission power: Class 2
Response frequency: 15~20000Hz
Speaker unit: Φ 13MM
Charging input standard: DC 4.75-5.25V/1-40MA
Earphone battery: 3.7V lithium battery, 40mAh
Charging compartment battery: 3.7V lithium battery, 400mAh
Charging time: approximately 2-3.5 hours (charging case+headphones)
Headphone working time: approximately 5 hours
Charging case charges headphones approximately 3 times
Keys: Touch
Material: ABS
Color: black, white
Portable batteries mainly provide electricity for portable and cordless devices. A more common definition is that it also includes driving a Subtyping under a large type (possibly operated by the main group), such as laptop. The Subtyping of the above model may be the clock or spare battery in the computer. Larger models of batteries, such as those weighing 4 kilograms or more, are not considered portable batteries. The typical portable battery nowadays is about a few hundred grams.
