The Duality, combining True Wireless Stereo Earbuds with a Wireless Speaker, is a music lover's dream come true. The all-in-one speaker doubles as a storage and charging station for the earbuds and also features a phone stand function to hold your device while the music is playing. With over 2 hours playback time these earbuds are great for extended activities and the ergonomic earbud shape helps them stay put while exercising. The speaker has a built-in FM radio module and a built-in microphone for receiving or making phone calls and an anti-slip base. The Duality includes a micro-USB charging cable to recharge its 500mAh lithium battery and comes in a brown gift box. Playback time: 2.5 hours for the speaker and 2 hours for the earbuds per charge (at 70% volume); Talking time: 2 hours; Output: 5W.