General description Customized senior shielding inductor approved by audiophiles in popular forums, improving the most important LC filtration procedure for digital amplifiers. The Bluetooth Hi-Fi wireless connection uses a top British CSR 4.0 Bluetooth module, ensuring high-quality audio transmission. With FM function, you can listen to music anytime and anywhere. Compatible with car, motorcycle, MP3, computer speakers, and other audio applications. AUX high fidelity audio frequency inputs allow easy connection to an extensive range of audio-visual products such as CD/DVD/PC. Technical specifications Model Number: -502S Input power: DC 12V Speaker impedance: 4 - 8 ohms Frequency response: 20Hz - 20KHz Total harmonic distortion: more than 0.05% Sound track: 2 : 85dB Product size (L x W x H): 15.50 x 10.50 x 4.50 cm / 6.1 x 4.13 x 1.77 inches Material: Aluminum Alloy Color: Red Compatibility and accessories Compatible with: MP3 Supports: Bluetooth, FM, Remote Control, SD Card Audio