Compatibility no apparent flaw

We enjoyed the control monitoring by the seller outside.
This pack turns out, for now, quite compatible with the "original".
The absence of cord between the two handles is particularly popular with users, especially the youngest (7 years).
Additional Notes:
1. We have not focused on the aspect of appreciation "funny" because it is an accessory, not a play.
2. He can be useful to develop rechargeable batteries in sufficient numbers when using "intensive"