omatically at a certain time and showing locker number with a handset.7.?Two ways for power supply: 4*AAA battery l Cabinet Locker Door LockModelKR-S80BBrandKERONGSizeLock body(L*W*H): 80*80*27mmWeight200g(with lock hook)Material of lock bodyABSUsagegyms, sports and fitness clubs,dormitory storage locker; gym cabinet;swimming Dormitory storage locker; gym cabinet; swimming pool storage locker; drawerDriven modeMotor/ ServoBattery6V(4*1.5V AAA batteries)Warning voltage4.5VStatic power consumptio