Material

•  metal (1)
•  plastic (2)
•  textile (1)

Capacity

•  up to 4000 mAh (2)
•  up to 20000 mAh (1)

Speaker

•  up to 2 W (1)
•  up to 3 W (1)

Interface

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

Interface (supplement)

•  AUX connector (2)
•  Micro-B connector (1)
•  Type-A connector (2)

Weight

• 0.17 kg - 0.245 kg