Mini Wireless Bluetooth Speaker Smart USB Rechargeable 400mah Waterproof Portable Speaker for Indoor Outdoor Black

Feature: 1. FULL RANGE SPEAKER: Mini Bluetooth speaker elastic bio diaphragm, sound more penetrating, inner full range HD speaker, enjoy clear music. 2. CLEAR SOUND: Mini wireless speaker sound clear, surging dynamic, bass thick and powerful, full of shocking sound. 3. MONO: Wireless Bluetooth speaker using mono speaker combination, bass clear and more shocking. Intelligent chip, one key switch. 4. BUILT IN MICROPHONE: Portable Bluetooth speaker with built in microphone design, support HD voice calls. 5. USB CHARGING: Waterproof Bluetooth speaker with USB port, compatible with most devices, easy charging, suitable for indoor and outdoor use. Specification: Item Type: Mini Bluetooth Speaker Material: ABS Product Size: Approx. 4.5x4cm 1.8x1.6in Battery Type: Polymer Battery(Shipped with Built in Battery) Battery Capacity: 400mah Frequency Response Range: 20HZ to 20KHZ. Package List: 1 x Mini Wireless Bluetooth Speaker1 x USB Data Cable1 x Lanyard1 x Instruction Manual Note: All data are measured manually, and there are certain errors in the measurement results.