Main Soundbar: - Bluetooth 4.0 - High quality wireless audio transmission through Bluetooth A2DP Profile - Over 10m Bluetooth transmission distance - 5W * 4 full frequency speakers - Audio frequency response : 150Hz ~ 20KHz - HDMI version: 1.4a - HDMI with CEC - Digital 5.1 decoder. - Digital LED display - 2 channel wireless UHF receiver - 3 channel wireless audio transmitter for left surround, right surround and sub-woofer - Multiple sound effects Surround Speakers: - Bluetooth 4.0 - High quality wireless audio transmission through Bluetooth A2DP Profile - Over 10m Bluetooth transmission distance - 5W * 2 full frequency speakers - Audio frequency response: 150Hz ~ 20KHz - Wireless audio receiver - 2200mAh Rechargeable Li-on Battery - Up to 3 hours duration time at maximum volume in surround mode - Over 12 hours duration time at normal volume in standalone Bluetooth speaker mode. Microphone: - High performance UHF wireless microphone - High sensitivity dynamic microphone - 2200mAh rechargeable Li-ion battery - 18 hours operation time - Automatic turned off if no voice input for over 10 minutes - Low battery indicator - Automatic turned off at ultra-low batter voltage