Brand : 321OU Color : Silver RAM Size : 2 Operating System : Multi SIM card support : Yes With Camera : Yes Band Material : Stainless Steel Compatible Operating Systems : Android & iOS Model Number : 07DMKNX5N Are batteries needed to power the product or is this product a battery : Yes

Bluetooth 5.0 chip
A new generation of Bluetooth 5.0 technology,
Playing time: 3-4 H, speaker: high quality true copper ring speaker
Headphone battery capacity: 45mAh
Charging box battery capacity: 300mAh, effective distance: 10 + M
Auto power on, auto pairing, popup, touch, binaural call
Summon Siri Magnetic Charging
Compared with Bluetooth 4.2, the power consumption is lower, smoother, and the transmission speed is faster.
Has stronger anti-interference ability and stable signal. Low energy consumption, automatic pairing
Mini and compact, easy to carryEasy to take in pockets or bags