Headphone Power Source- Micro USB Charging. Other Power Features- Recharge 30 Minutes before 1st Use. Technology Used- Wired & Wireless, TF Card Supported, Bluetooth, Aux Supported. Wireless Bluetooth headphones are rechargeable & Mic and with heavy bass and Best sound quality. You can play songs with Bluetooth Connectivity & Also with Aux. You can insert memory card in this headphone and play songs without connecting your phone These headphones make listening to music convenient and hassle-free as they come with buttons to use at work., Can freely control the switch of previous song and next song, pausing song, answering calls, ending calls, refusing the incoming call, dialing the last number, volume control., Answering phone communication, music and phone controls ensure ease of use.