... -battery 2,Mp3 player,USB/TF card 3,LED Display 4,Mini size,Easy to take 5.FM ... time:8-15hrs(Deending on the volume and temperature)*Net weight:485g(Including battery)*Dimension:105*97*41mm*Amplifier ... 1set*14650 Lithium battary x 2pcs*Audio cable x 1pc*Hanging belt x 1pcTeaching, Tour guiding, Morning exercise, Training, ... Mini Size Rechargeable Portable Voice Amplifier with LED display V-5