The Emerson EG-1501 designed for a seamless, hassle-free listening experience. A super-low latency of approximately 50+/10ms keeps sound and visuals perfectly in sync. Touch controls let you manage calls or music with a simple tap. The Bluetooth allows you to have a seamless streaming from any paired devices and enjoy up to two hours of playtime from a full charge.Number of Batteries: 2Number of Speakers: 2Included: 1 Usb Cable(s), 1 Warranty Card(s)Features: True WirelessBattery Type: Lithium IonImpedance: 32 OhmsManufacturer Warranty: 90 Day LaborPlayback Formats: Mp3Power Source: Plug-InUse: IndoorMeasurements: 5.7 Height/Inches, 4.4 Length/Inches, 1.6 Width/InchesMaximum Frequency Response: 20 KilohertzWeight (lb.): 0.1 LbBase Material: 95% Plastic, 5% Other 5% Or LessCare: Wipe CleanMaterial: PlasticCountry of Origin: Imported