AVA UNI-K Wireless Tattoo Pen – Adjustable Stroke 2.5–5.0 mm

The AVA UNI-K Wireless Pen Machine is a fully adjustable, feature-rich tattoo machine designed for artists who need maximum versatility and control. Built from durable aircraft-grade aluminum and powered by a high-performance brushless motor, the UNI-K delivers smooth, consistent results with minimal vibration thanks to its direct drive system.

Its key highlight is the internal adjustable stroke system, allowing you to set the stroke length anywhere between 2.5 mm and 5.0 mm. This gives artists the freedom to handle everything from fine line work and soft shading to bold lining and color packing. Stroke adjustments are simple and precise using the included tools.

Performance & Control

The UNI-K offers two torque modes to match different tattooing techniques:

• High Torque Mode (H): Strong, consistent penetration for clean, crisp lines
• Low Torque Mode (L): Smoother needle movement for shading and gradients

An OLED HD color display clearly shows voltage, frequency, timing, memory presets, and Bluetooth status. The smart timing function automatically tracks session time and retains data even when batteries are changed. The memory system allows up to four custom voltage presets for quick workflow adjustments.

With a 1600 mAh battery, the UNI-K provides up to 7–8 hours of runtime depending on voltage. Each unit includes an extra battery and additional grip, making it ideal for long sessions. Bluetooth capability also allows pairing with an AVA wireless foot pedal for added convenience.

Key Features

• Material: Aircraft-grade aluminum
• Motor: Brushless motor
• Drive System: Direct drive
• Stroke Range: 2.5–5.0 mm (5 options: 2.5 / 3.5 / 4.0 / 4.5 / 5.0 mm)
• Motor Speed: 10,500 RPM
• Torque Modes: High (H) and Low (L)
• Display: 1.47" OLED HD color screen
• Voltage Adjustment:

• • ±0.1 V per press

  • ±1 V per hold

• Memory Modes: M1 and M2 in both H and L modes (4 presets total)
• Timing Function: Auto start, battery-change retention, reset via +/- hold (3 sec)
• Needle Protrusion: 0–5 mm
• Battery: 18500 Li-ion, 1600 mAh, 3.7 V
• Charging Input: 5V / 2A
• Power Intake: 5 W
• Grip Diameters: 32 mm and 39 mm
• Pen Size: 127 × 32 mm
• Weight: 218 g
• Color: Black

How to Adjust the Stroke Bearing

1. Loosen the bearing screw using the 1.3 mm hex wrench
2. Adjust the bearing scale with the flat-head screwdriver
3. Tighten the screw securely once set

What’s Included

• 1 × AVA UNI-K Machine
• 1 × Extra battery
• 1 × Extra grip
• 1 × Charging head
• 1 × Data cable
• 1 × Flat-head screwdriver
• 1 × Hex wrench
• 1 × Travel bag
• 1 × Outer box
• 1 × Instruction manual

The AVA UNI-K Wireless Pen Machine is a premium choice for professional tattoo artists seeking adaptability, precision, and dependable wireless performance in one powerful machine.