Specifications: 1) Model: TBL-A a) Lamp house: two super high brightness LEDs b) Visible distance: 500 - 600m c) Function: Off / Flash 2) Model: TBL-B a) Lamp house: one super high brightness YN-E1 xenon light i) ) Visible distance: 1,400 ?C 150,000m ii) ) Function: Off / Flash b) Lamp house: one super high brightness U-xenon light i) Visible distance: 1,400 - 1,500m ii) Function: Off / Flash 3) Model: TBL-C a) Lamp house: one super high brightness incandescent bulb b) Visible distance: 550 - 650m c) Function: Off / Flash 4) Model: TBL-D a) Lamp house: two super high brightness LEDs b) Visible distance: 500 - 600m c) Function: Off / Flash 5) Model: TBL-E a) Lamp house: two super high brightness LEDs b) Visible distance: 500 - 600m c) Function: Off / Flash 6) Model: TBL-F a) Lamp house: two super high brightness LEDs b) Visible distance: 500 - 600m c) Function: Off / Flash Inner switch: 1) Flashing: flash automatically at nighttime and close automatically at daytime 2) Power switch: shut off the power 3) Two shunt-wound batteries of 6V (4R 25) can supply power for 550 - 750 hours; also can work with one battery 4) Function: Off / Flash and Off / Flash / Constant Inner packing: One PVC bag Outer packing: 12pcs/carton Carton dimensions: 48 x 38 x 37cm Conveyance: Qty/20\'\' FCL: 5,100pcs