Material

•  metal (1)
•  plastic (2)

Capacity

•  400 mAh (1)
•  400 mAh (1)

Interface

•  Bluetooth (1)
•  Bluetooth 4.x (2)
•  Bluetooth 5.x (5)
•  Qi (3)
•  USB (8)

Interface (supplement)

•  AUX connector (2)
•  Micro-B connector (2)

Weight

• 0.185 kg - 0.205 kg