Cheyenne Thunder 1st Generation Open Box but Brand New, this Thunder has been on display for years and being swapped out with the current version. Technical details: Stroke: 4 mm Needle depth: 0 - 4,0 mm Motor: DC motor Frequency: 70 - 160 Hz Voltage: 6 - 12,6 V Power Input: 2,5 W Connection: 3,5 mm protected jack connector Dimensions: Ø 32 mm x 110 mm x 77 mm (with grip) Weight: 95 g (without grip) Manufactured according to medical standard: ISO 13485 Made in Germany