Description Features: 1. Dual waterproof speaker with aluminum stereo main unit. High-performance power amplifier built-in. 2. Speaker clamp with universal fit for 78 to 114mm handlebars. Supports Bluetooth wireless connection up to 15 meters. 3. 3.5mm jack AUX IN available. Supports USB and micro SD card MP3 playback. 4. Bluetooth wireless: Stream music and radio channels from your smartphone. Compatible with 4/5/6/7/8/X, iPod, Android Galaxy S and Note series, and other smartphones. 5. Superior crystal-clear sound quality. Advanced waterproof design. Digital display. 6. Stereo unit constructed with high-quality aluminum material. Ideal for motorcycles, ATVs, electric bikes, marine boats, and outdoor use. Specifications: Frequency range: 87.5 - 108 MHz Sensitivity: 37dB Distortion: 0.5% Signal to noise ratio: 40dB Rated voltage: 12V DC Maximum input power: 7W x 2 Rated impedance: 4 - 8 ohm Bluetooth version: 2.1 EDR Bluetooth protocols: AVRCP 1.0, GAVDP 1.0, AVDTP 1.0, A2DP 1.0 Wireless transmission range: 15 meters Frequency response: 20Hz - 20kHz 3.5mm jack: Yes SD slot: microSD USB: USB drive with MP3 format USB charging: No Note: 1. Due to differences in monitors and lighting effects, actual color may vary slightly from the image. 2. Please allow 1-3cm variation due to manual measurement. Package List: 1 x Speaker 1 x Hex key 1 x Manual