The Edifier S3000MKII powered wireless bookshelf speakers elevate your audio experience to new heights. Bluetooth v5. 0 with Qualcomm aptX HD Technology wirelessly transmits lossless and high-definition music signals, allowing Bluetooth playback to achieve the same music quality as wired digital transmission. Certified HiRes, the active speakers offer improved response across a broader range of frequencies. 2 active speakers are connected via proprietary 5. 8-GHz and 5. 2-GHz connections. The high-speed and low-latency connection guarantees the uncompressed signal transmission and the real-time signal synchronization between the 2 active speakers. 256 watts (RMS) total output power driven by two 175-watt stereo PurePath Ultra-HD Class-D TI amplifiers. Frequency response: 38 Hz to 40 kHz; signal-to-noise ratio higher than 85 dB(A). Bluetooth v5. 0 with Qualcomm aptX HD decoding with sampling depth up to 24 bits and sample rate up to 48 kHz; top-line high-performance chipsets from Texas Instruments and XMOS XU216 for the end-to-end digital audio processing. 5. 8-GHz and 5. 2-GHz dual-band wireless connection between the 2 speakers. Each speaker has one 6. 5-in. long-throw aluminum diaphragm mid-low driver with an aluminum basket and one 4. 2-in. x 4. 2-in. horn-loaded planar magnetic tweeter. Hi-Res audio certified: supports minimum of 24-bit/96-kHz signals. Control knobs located on right speaker plus IR remote is included for easy playback control. Audio inputs: balanced XLR, optical, coaxial, USB Type-B receptacle, line input, and Bluetooth. Works with EDIFIER ConneX app for even more functions such as playback control sound effects switch and customization, and user manual. Dimensions, per speaker: 8. 74 in. x 14. 17 in. x 10. 55 in. (222 mm 360 mm 268 mm). Includes 2 power cables, fiber-optic cable, RCA to RCA cable, 3. 5 mm to RCA cable, USB connecting cable (not for charging use), remote, 2 AAA batteries, and quick-start guide.