Lantern Rechargeable Bug Zapper | Stv887 4 built-in LED lights Hang or free-stand 6 hours use per charge Indoor and outdoor use USB rechargeable battery pack Most effective in low-light conditions Zero In Lantern Rechargeable Bug Zapper - Flying Insect Killer | Stv887 Zero In Lantern Bug Zapper is a rechargeable unit that uses powerful LED lights to attract nuisance flying insects into an electrical grid, killing them quickly and hygienically. Use it inside or out, either hanging o free-standing on tabletop and affected areas, for effective and trouble-free control of biting flies.