? UNIVERSAL 510 THREAD. Compatible with almost all the 510-thread HIGH capacity batteries. | ? ULTRA-SAFE & SMART. Built-in Over-Charge Protection to ensure safely charge. | ? SPECIFICATIONS. 2-Pack, Input 5V/500mA, Output 4.2V/420mA. Warm Tips: The input Voltage/Current are not allow to exceed 5V/1A, which means you can not use fast charger to power it. | ? PACKAGE LIST. 1* 510-Thread USB Charger Cable, 1 * Cordless USB Charger, 1 * LIELONGREN Warranty Card. | ? WARRANTY. 45 day refund, 12-month worry-free warranty. Professional after-sales team provides free life-time technical support. You can apply for service support with your order ID at any time.

👍 Upgraded with Volume Control. Compare with the previous version, The Newer USB Computer Speaker is boasting 3 volume control buttons, including Volume+/ Volume-/ Mute, which is very convenient. | 🔊 Upgraded to 8W Powerful Output. The USB Speaker is built in dual 4W High-Sensitive Internal Magnetic Driver, ensures louder volume, greater dynamic range, richer bass and lower distortion. | 🔌 One Cable for Both Audio & Power. No need for driver software, No need for 3.5mm AUX cables. Just plug-n-play, very easy to use. | 💻 Good System Compatibility. Desktop Computer Speaker is compatible with Windows, macOS and Chrome OS laptops and desktop computers, as long as they had installed the latest audio driver for their sound card. | 💻 Broad Hardware Compatibility. The External Laptop Speaker can work great with various brands of PCs, such as Apple MacBook, Lenovo, ThinkPad, HP, Samsung, ASUS, Dell, Acer, LG, Google Chromebook, Microsoft Surface or more.

█ Stereo Sound Speaker. N12 Portable Mini Sound Bar is a 2.0 channel speaker equipped with two high-excursion drivers for full range audio, which deliver a noticeable stereo sound upgrade to your computer's weakened or faint internal speakers. | █ One Cable for Both Audio & Power. N12 USB Powered Speaker only needs a single USB cable to plug into your computer to feed an electrical current and power the speaker while simultaneously working as the audio input and source of the speaker's sound. | █ Two Installation Options. You can use the included clip-on mount to attach directly to any laptop screen that is ½ inch thick or less. And if you prefer a freestanding option to place next to your computer on a desk, use the included mount to prop the speaker up in a vertical position. | █ Great Compatibility. N12 USB Computer Speaker works great with all brands of Windows PCs, such as HP, Lenovo, ASUS, Dell, Acer, Chromebook or more. (Do not support Mac OS). | █ Some Words From Seller. This USB Desk Standing Speaker is widely used in office and bedroom, it can save space of your desk and help averting messy cable, it's portable and light weight but delivering a noticeable stereo sound, while it would not be too loud to disturb your partners.