JOWOOM Lea CorkeryT2 Multi-fHollis FeilunctionDr. Valerie Jacobson IIDr. Zander Kub DDSal SmartLaverne Stark III GuitarMr. Bo Treutel Tuner PeDr. Patience Morarg String Winder fModesta Wolffor Guitar Irving BartonUkuleStephen SmithamMiss Eloise Auerle ChrDr. Vivienne Luettgenomatic Tuning BuilElfrieda Schustert-in RecElijah Funkhargeable Chadd CartwrightCelia RaynorLithium Bat-tLelah CollinsHobart Rohanery

Features:
Smart Tuner + String Winder: 2-in-1 multi-functional string instrument tool for string instrument players. It makes guitar or ukulele tuning easier, more time-saving and convenient to use. A must have for beginners or professionals.
3 Tuning Modes Switchable: Supports auto tuning mode, semi auto tuning mode and custom tuning mode (for acoustic guitar only), different modes designed for optimized tuning experience, which can satisfy all your guitar/ ukulele tuning needs.
Wide Range of Use: Suitable for acoustic guitar, classic guitar, electric guitar (guitar-- 6E, 5A, 4D, 3G, 2B, 1E), ukulele (4G/ LG, 3C, 2E, 1A) and chromatic tuning (C, C#, D, D#, E, F, F#, G, G#, A, A#, B), and with colorful LCD display showing the battery level, string number, target pitch, pitch distance (Lo/ Hi), etc..
Easy-to-Use String Winder: Fast and easy wingding, just press the UP/DW button, then you can tighten or loosen the strings quickly, save time and energy; direction indicators allow you to confirm the wingding direction easily; with easy-to-plug peg connector, suitable for different tuning pegs.
Strong Endurance & Fast Charging: Built-in 2600mA lithium battery, which can be recharged by the included USB cable, and the charging indicator let you know the current battery capacity.

Specifications:
Color: Black
Tuning Mode: Auto, Semi-auto, Custom (for acoustic guitar only)
Guitar: 6E, 5A, 4D, 3G, 2B, 1E
Ukulele: 4G/ LG, 3C, 2E, 1A
Chromatic: C, C#, D, D#, E, F, F#, G, G#, A, A#, B
Power Supply: 1 * 3.6V 2600mA Rechargeable Lithium Battery
Charging Time: 2H
Charging Cable: Micro USB 5pin 5.2V DC 1.0A
Current: stand by 16mA, motor tuning 250mA
Item Size: 11 * 9 * 3.6cm/ 4.3 * 3.5 * 1.4in
Item Weight: 213g/ 7.5oz
Package Size: 16.2 * 13 * 5cm/ 6.4 * 5.1 * 2in
Package Weight: 328g/ 11.6oz

Note:
The guitar showed in the picture is not included.