Q: Does WOTANCRAFT leather strap require maintenance

Dimension (inches / mm): 13 x 9 x 4 / 330 x 225 x 100 (fully expanded)

They do not use batteries

Length:   55

it is also equipped with the Dango Pen and Notebook

REPLACEMENT BUMPERS FOR DANGO COVERT CASE Pouches Q: Does WOTANCRAFT leather strapThe replacement Bumpers protects the corners of your device. It also helps to nudge your device to fit snuggly. Made from flexible TPU material. To install, seat the thin portion of the bumper into the corner slot of the case. Then, simply squeeze the oval protrusion into the oval cut out of the aluminum case. Compatible with all Aluminum Covert Cases.