Sharper Image SBT517WHRD Premium Bluetooth Earbuds with Mic, White/Red The Premium Bluetooth Earbuds by Sharper Image makes listening to your favorite music that much easier. Simply connect to your device via Bluetooth and you're ready to start listening, or connect to multiple devices with the headphones' Multipoint Connectivity technology Answer your phone calls hands free with the headphones' in-line microphone, meaning you'll never have to take your The rechargeable lithium-ion battery on the headphones can hold a charge for up to 4.5 hours of talk or play time, The headphones are compatible with all iPads, iPhones, Android and Galaxy smartphones and tablets, Laptops, Amazon Frequency range 20-20khz, sensitivity 101.3dB, impedance 16 ohm, unit driver 9mm