[The built-in machine is 57X30mm roll paper]The machine is compatible with label paper and sticker paper, but it needs to be purchased additionally on Amazon [mini printer bluetooth connection app]Bluetooth 4.0 connection. Connected to the ""APP through Bluetooth, without wire. System: for android 4.0, for iOS phone 8.0 or above. Press the gray button on the side of the printer for 3 seconds to turn on the printer before connecting to Bluetooth. [Paper width 57X30mm and minimalist design]simple stylish shape, mini & small pocket printer Paper width, The paper cannot be left in the sun, otherwise the words or images will be weakened. [High-quality and clear printing effect]A number of QR code and sticker templates, the printing algorithm is optimized, the paper fits closely, and the mini printer is of high quality and easy to use for smartphone print. [Multifunctional mini mobile printer suitable for multiple scenarios]The small printer can connect to your smart phone, pictures/photos/stickers/logo/travel/work/to-do/note/receipt/business/home/machine/office/logo/QR code/thermal printer to accompany your child kids, a great gifts for your child play. Colour:White Material:ABS Size:8.31 x 8.31 x 4.06 cm Package Contents: 1 x Printer 1 x Printing Paper 1 x USB cable 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.