ELIMINATING NOISE: Completely eliminates the buzzing noise caused by ground loops when the audio source and speaker use different power sources. WORKING PRINCIPLE: Designed to deliver clear audio by reducing current noise in car speakers and home stereo systems. COMPATIBLE MODELS: Works with any device featuring a 3.5mm audio jack, including car audio systems, home stereos, and Bluetooth receivers in car audio setups. COMPACT & PORTABLE: Miniature and lightweight (2.01 x 0.59 x 0.59 in, 0.99 oz), this device is easy to carry and installs without taking up space. ENJOY CRYSTAL SOUND: Connects to the AUX jack in your car to reduce noise and deliver high-quality audio performance. Specifications: Color: Black Frequency Response: 20Hz - 20kHz Jack: 3.5mm Package Size: 7.5 x 4 x 2 cm / 2.95 x 1.57 x 0.79 in Package Weight: 36g / 1.27 oz Connection Instructions: Connect the Ground Loop Isolator between the speaker and the audio source using a dual 3.5mm audio cable or a 3.5mm to RCA cable as shown. Note: Can be used in either directionplug one jack as input, the other as output. Package List: 1 x Noise Isolator 1 x 3.5mm Audio Cable