Product name: retro bluetooth speaker Battery capacity: 900mAH Rated voltage: 5V Rated power: 3W Charging time: 2 hours Working time: 8 hours Effective distance: 10 meters Connection method: Bluetooth connection Function: NFC function Connection method: Bluetooth connection Interface type: USB Power supply mode: USB Frequency response range: 40Hz-20KHz Output power: 2W Signal to noise ratio: 70db Power supply mode: built-in lithium battery Channel: 2.1 Play time: 6 hours Bluetooth protocol: 5.0 Effective distance: 10 meters Play format: MP3, WMA, WAV Shell material: l plastic Speaker adjustment method: button Applicable scenes: car, desktop, outdoor, home, mobile portable, live broadcast, square dance, outdoor lawn Product weight: 80g/125g with color box 102*69*38mm packing list: Speaker host 1 + lanyard + USB cable + manual