Power Mode: USB Charging Operating Voltage: ≤36V Battery Properties: Rechargeable Battery Rechargeable Battery: Lithium Battery-Polymer Wireless Communication Technology: Wireless Speaker Unit: Dual Speakers Special Features: Bass Boost,USB Port Surround Sound Channel Configuration: 5.2 Water Resistance Level: Non - Waterproof Recommended Usage: For surround sound systems,For music players,For televisions Amplification Type: Passive Store Information Function: card insertion, radio Type: speaker Connection method: connection, card reader Interface type: card reader, USB Frequency response range: 100HZ-20KHZ Output power: 10W Signal to noise ratio: ≥ 85dB Power supply method: built-in lithium battery Extended storage: 32GB Number of speakers: 2 Effective distance: 10 meters Operation method: buttons Applicable audience: general Display screen: None Playback format: MP3 Shell material: plastic Does it support apps? No Supported formats: TF ca