These lights were purchased from Vinh Nguyen in 2014, and have been modified for higher output. They have been rarely used and are in excellent and fully operational condition. They ship in the original packaging and include 4x18650 Nitecore 3400mah batteries.
Welcome to BLF
Good luck selling these awesome lights!
Post the specs please.
The TK61vn was ordered as a TK61vn 6500K Dedome PDT whose specs can be found in this review.
The TK75 is a tk75vn XML2 6500K De-Dome Burn-in KillerThrow Edition