No battery charge required
Operates with electric power generated from solar energy and stored in a large-capacity rechargeable battery that never requires charging, thus reducing the environmental burden.
Charges even under low light conditions
Generates sufficient electric power to keep on charging, even with limited light from cloudy skies or indoor fluorescent lighting.
Stable function operation
Generates ample power for smooth operations of various power-hungry functions, including time-calibration signal reception, 5-motor operation, alarms, sensors and backlights.
Large-capacity rechargeable battery
Continues operating for approximately two years* on a full charge, even unlighted locations.