Summary

you can reuse digimon mini`s buttons

https://www.devicemart.co.kr/goods/view?no=15238454&NaPm=ct%3Dly5c70kl%7Cci%3Dcheckout%7Ctr%3Dppc%7Ctrx%3Dnull%7Chk%3Db1504e1b058a3414ea6a8981dea3d6c306e58f3e

https://m.vctec.co.kr/front/php/product.php?product_no=22256&NaPm=ct%3Dly2fl9e6%7Cci%3Dcheckout%7Ctr%3Dppc%7Ctrx%3Dnull%7Chk%3D81c248a87737abc0526694b067a240e46568839d

you can also put a-com and charging port in to use this thing.