Premium Quality Wireless Keyboard $ 16.10 Working voltage: 1.8-3.0V Working current: s2.5mA Low battery alarm: 2V Sleep current: s0.2mA Battery capacity: 2 * 3AAA Key life: 3 million strokes Button strength: 50-70g! Connection distance: 10m Number of keys: 59 keys Sleep: 2-3 seconds without operation Working temperature: -10 * C ~ 55C Reconnect duration: 2-3 seconds Wake up time: 3 seconds