On the basis of sufficient positive reviews I decided for MPOW Cheetah.
Scope of supply:
1 x MPOW Cheetah Sport Bluetooth Headset
1 x Micro USB charging cable (approx 25cm)
1 x Stereo Bluetooth Headset User Manual (English)
4 x ear tips pieces
Charging time:
The charging time was one hour with me. (Battery was probably partly loaded)
Connection:
The connection was made directly.
Comfort:
The headset is very comfortable and fits comfortably in the neck.
Sound:
+ Volume is optimal (setting on headphones and Smartphone)
+ Pleasant bass
- The sound could be a little clearer
Conclusion:
For the gym these cheap headphones is definitely recommended. The price / performance ratio was right here in any case.