This 10 light solar string light set is easily installed in mulch, gravel, sod, or on wood surfaces such as decks and docks. A spade bit is included for wood surface installation. This set features an external solar panel that can be placed in an optimal full sun location and contains a built in timer with programmable 4, 5, or 6 hour run time.3 AA' 1200MAH NiMH battery (included) Auto on at dusk. off at 4, 5 ,or 6 hour adjustable timer Contents: solar panel, 1 ground stake, 10 light solar string set, spade bitBulb Type: LED Category Group: Landscape Ltg. Category Sub Group: Other Landscape Ltg. Collection: Solar Micro LightString - Solar Color Temp: 3000K Cord Length: 60' (6' Between Lights) Finish: Black Height: 1.00 Length: 1.00 Lens Body Finish: Clear Polycarbonate Plastic Lens Light Direction: Up Lighting Number of Lights: 10 Socket1 Max Wattage: 0 Socket1 Number Of Bulbs: 10 Solar: Yes Solar Cell: 4-3 4H x 3-3 4W x 1-1 8D Style: Transitional Wattage: 0.06 Weight: 1.10 Width: 1.00