Harman Kardon | Speaker Onyx Studio 4 Wireless Speaker Bluetooth Portable

Bluetooth version: 4.2 Support : A2DP 1.3, AVRCP 1.6, HFP 1.6 Frequency response : 50Hz - 20kHz (-6dB) Signal to noise ratio : 80dB A-weighted Power supply: 19V/2A Battery type : 3.7V/3000mAh Lithium-ion