1、Detachable Design: This press trainer features a detachable design for easy portability and storage. You can use it for training anytime and anywhere, and disassemble it to put it into your backpack or guitar bag. 2、Easy To Maintain: This press trainer is easy to clean and maintain. You can keep it clean and hygienic by wiping it with a damp cloth. 3、Strengthen Finger Strength: Using this press trainer can effectively strengthen your finger strength and dexterity. It is designed to have the right amount of pressure and resistance to give your fingers a full workout and prepare them for guitar playing. 4、Improve Playing Level: By practicing using this press trainer repeatedly, you can improve the strength, dexterity and control of your fingers, thus improving your guitar playing skills and level. It is an effective tool for developing guitar technique. 5、Excellent ABS And Silicone Material: This press trainer is made of excellent ABS and silicone material, which is wear resistant and durable, and comfortable to touch. Item Type: Finger Strengthener Material: ABS, Silicone Battery: CR2032 Button Battery x 1 Capacity: 210mAh ( Shipped With Matching Battery ) 1 x Finger Strengthener 1 x Battery