Features

S-Master Digital Amplifier: The Sony SRS-X33 Bluetooth speaker system houses two 1.3125" full-range drivers powered by a built-in 20W S-Master digital amplifier for excellent midrange sound. Two oval passive radiators are used for added bass and depth. The S-Master digital amp incorporates two Sony proprietary sound technologies - Clear Audio+ & DSEE (Digital Sound Enhancement Engine).

• Clear Audio+: ClearAudio+ automatically adjusts sound settings for an enriching listening experience. By bringing together expertise in digital signal processing technologies, ClearAudio+ is able to optimize audio formats to deliver a consistently clear, high-quality sound, whatever music you're listening to.
• DSEE: DSEE upscales your compressed digital music files (SBC, AAC, etc.) and takes it closer to the quality of High-Resolution Audio. By restoring the high-range sound lost in the compression process, DSEE produces your digital music files in rich, natural sound, closer to the quality of the original recording.

Bluetooth Technology: The Sony SRS-X33 features built-in Bluetooth (Ver. 3.0) with support for A2DP wireless audio streaming and multiple audio codecs; like SBC, AAC, and LDAC. It also offers support for HFP, so you can use the SRS-X33 as a hands-free speakerphone for your mobile phone. The speaker system also offers Simple Secure Pairing (SSP) and Near Field Communication (NFC).

• Wireless Audio Streaming w/ LDAC: You'll be able to wirelessly stream stored music and music apps from your Bluetooth-enabled Apple device, Android smartphone/tablet, portable audio player, laptop, or PC to the Sony SRS-X33 speaker system. In addition to support for Bluetooth standard SBC codec and Apple's AAC codec, the system also supports Sony's newest LDAC codec. LDAC is a new audio technology from Sony that allows you to enjoy high quality wireless audio via Bluetooth. With 3x the data transmitted (compared to regular Bluetooth), LDAC provides an enhanced wireless listening experience for all your music.  You'll continue to use your Bluetooth-enabled mobile device for music navigation and song/artist information display.
• Hands-Free Speakerphone: You can use the SRS-X33 as a hands-free speakerphone for your Bluetooth paired Apple iPhone, Android smartphone, Windows phone, Blackberry and other Bluetooth enabled mobile phones. The caller's voice is heard through the system's speaker, while you speak into the unit's built-in microphone. You can answer and end a call by pressing the top-panel "phone icon" button. You can also activate the voice command function of your phone to dial a number by pressing this same button. In addition, a long press of this button, will redial the last phone number you called. All other phone functions will be handled from your mobile phone.
• Simple Secure Pairing + NFC: The SRS-X33 pairs wirelessly and effortlessly with Bluetooth enabled devices (up to 9) with a single press of a button. Bluetooth-enabled devices (like Android 2.3.3 or later) that have Near Field Communication (NFC) are even easier to pair with; simply touch the device to the NFC logo on the speaker and they're paired. NFC Easy Connect app is needed for your Android device, unless you have Android OS 4.1 or later installed. Once paired, the speaker system will automatically re-connect to your device when within range (up to 33').

Aux Input: In addition to wireless Bluetooth connectivity, the Sony SRS-X33 is fitted with a 3.5mm auxiliary input for connection of almost any portable audio player with a headphone output.

Rechargeable Battery: The Sony SRS-X33 operates off of battery and AC power. The built-in lithium-ion rechargeable battery can last up 12 hours. The included AC power adapter and cable charges the built-in battery and supplies power to the speaker system.