2016 New Ultra Portable Dustproof Waterproof Bluetooth Speaker Outdoor Sport Mini Wireless Speaker Running Hiking 5 color 1. fashion design, silicone material, soft touch, small, portable, outdoor sports waterproof speakers. 2. Using Jerry reader + BK Bluetooth solution, 2.1 + EDR version. 3. Support Bluetooth connectivity / MICRO SD card reader / AUX audio input mode can be switched freely. 3. Built-in high capacity rechargeable lithium polymer battery. 4. Support MP3 / WAV / WMA Playback 5.AUX sources: data cable to the computer and Bluetooth speakers can be wired to play 6. Output power: 3W Operating voltage: 3.7V Battery capacity: 400mah 7. Audio SNR:> 80dB Product Weight: 106g Product Net weight: 60g Speaker Size: 1.5 inches 8. Frequency Range: 80HZ – 20KHZ 9. continuous playback time: about 4 hours (50% volume) Bluetooth transmission distance: <10 meters Charging time: about 2-2.5H 10. Interface: MICRO / Audio combo interface TF deck: The following support 64GB memory card 11. Packing size: 56X31.5X38.5 CM QTY: 100 12. Accessories: Bluetooth speakers, brochures in English, the charge / audio cable.