Scatola del Tempo Watch Winder 7RT Grey Green 02069.GGRSIL. Full leather case with 3 programmable winders plus storage space for 4 watches with leather straps or bracelet suitable for regular size watches and oversize ones, with an extra compartment for straps. Programmable by Bluetooth technology and app to be downloaded on the smartphone, operates on batteries with an average life of 3 years.