handheld speaker sound amplifier loudspeaker for peddling double battery compartment ultra-long life battery stall portable outdoor promotion megaphone

918 (double warehouse receipt battery) 130s recording shouting music alarm plus or minus volume 918u (double warehouse receipt battery) 260s recording support u disk tf card 918l (double warehouse receipt battery) 350s recording support bluetooth usb flash disk tf card 918 (double warehouse dual battery ultra-long life battery) 130s recording shouting music alarm plus or minus volume 918u (dual warehouse dual battery ultra-long life battery) 260s recording support u disk tf card 918l (dual-warehouse dual battery ultra-long life battery) 350s recording support bluetooth usb flash disk tf card

21*18