Bluetooth Earbud, Silipower Single Wireless Cordless Earbud, Smallest Invisible Bluetooth Earpiece Headset with HD Mic for Car, Phones, Android and More Enhanced Comfortable Wireless Earbud: Weighs only 0.1oz and small enough, you can barely notice it while inside your ear. Ergonomic design allows for ultimate wearing comfort to match your active lifestyle like driving, running, biking, training, jogging, hiking, exercising. Fits either ear, left or right. Hands-Free Function: This cordless earbud built-in noise-canceling microphones, can be connected to two smartphones. Enjoy your mobile calls and hear streaming music and GPS directions without holding your phone or getting tangled in wired earbuds. Long Lasting Battery Life: With a built-in premium quality Lithium-ion battery, Silipower Bluetooth earpiece provides up to 6.5 hours' play time or 240 hours' standby time after fully charged for only 1.5 hours. High-Fidelity Sound: The Bluetooth earphone adopted with CSR chip and Bluetooth 4.2 technology deliver high-fidelity audio. Reduces noise, wind, and echo from calls and delivers HD audio clarity. Provide crystal-clear conversations even in noisy environment. Foolproof operation: One big button on the earbud so that you can play and pause music, dial a call, answer or end calls, and activate the voice control of your phone with one simple operation on the invisible earbud.