◎ Immediate purchase welcome ◎ Bulk purchase welcome ◎ Although it is an unused item, the box was opened for photography to confirm and prove that the contents are inside. I have not directly touched the main body inside the plastic. The following is quoted from the Sound House website: 【Features】 A tuner that can be attached to metal parts such as the back of guitar pegs and strap pins with a magnet. 【Specs】 ■ Guitar tuner with magnet ■ 360° rotating magnet, 　 Compatible with any angle. ■ Compact size and lightweight body. ■ Displays the string number and tuning up/down, 　 and deviation with LEDs. ■ Power-saving design due to its simplicity. Specifications ■ Temperament: 12-tone equal temperament ■ Measurement range (sine wave): E2 (82.41Hz) - E7 (2637.02Hz) ■ Measurement accuracy: Within ±1 cent, Reference pitch: 440Hz ■ External dimensions: 33(W) x 35(D) x 13(H)mm ■ Weight: 11g (including battery) If you have any questions or concerns, please feel free to comment. Thank you.