RECESKY C3 Bulbs Christmas String Lights with Timer - 50 LED 16.4ft Battery String Lights for Outdoor and Indoor, Fairy Lighting for Garden, Yard, Garland, House, Xmas Tree, Christmas Decorations PRODUCT DIMENSIONS - 50 LED string lights total length 16.4ft; lead length 3.3ft; lamp spacing 0.33ft. SMART TIMER - 1st "TIMER" Mode (automatically keep 6 hours on and then 18 hours off); 2nd "ON" mode (work on 24 hours); 3rd "OFF" mode (turn off the lights, no matter how you press the 8 modes button) BATTERY OPERATED - Requires 3 x AA Batteries (Not Included); String lights need not to plug or put in the sun which can be used at half conveniently and get perfect work in winter. LIGHT MODES - Up to 8 different light mode, A variety of options to meet your various needs. WATERPROOF - Level IP65 (Included battery case), suitable for outdoor use, but can not soak.