Tokk TMX09B Glow In-Ear Bluetooth Earbuds with Microphone (Black)Tokk TMX09B Glow In Ear Bluetooth Earbuds with Microphone (Black) 10 mm drivers; Frequency range: 20 Hz to 25 kHz; Bluetooth(R) 5. 0; Customized aramid fiber compound material in moving coil driver for maximum output; Laser lit, glow in the dark Opti Fiber Hybrid cable provides fun accent that also increases visibility of wearer in low light situations for safety; optional free app to engage glowing function; Battery life: up to 200 hours on standby;