1. 拍子機 Easy to change tempo, and it has a rhythm choose.
2. Tuner- hi range of pitch it can be use, from Low B bass guitar to Hi E Guitar any tone not just EADGBE.
3. you can Jack in to tune up your guitar or the mic inside.
4. you can plug in your ear-phone to listen to the 拍子機.
But it is $350, and you can buy that in tom lee TST(i am using that also)