- Not identified
- + 15 power levels + 3 massage modes, the fourth mode just alternately turns them on in a circle + works long enough without recharging (I have enough for a week for 20 minutes every day) + nice design + modern charging port
- - sizes are not suitable for every neck, for a good effect it should fit snugly with metal plates to the neck, for a miniature neck it will be problematic to achieve such an effect - no storage bag - difficulties arising from the lack of localization