Product details of Nia Q1 Over-The-Ear Bluetooth Wireless Headphones Bluetooth : V4.2 Sound Mode : 32 Ohm Speaker : Customized 40mm Nd Driver Unit Frequency Response : 20-20000Hz Sensitivity : 108+/-3db Battery : 3.7 V DC, 200 mAh Operating Time : 5-6 hrs Standby Time : 200 hrs Charge Time : about 2 hrs Nia Q1-bluetooth wireless headset, with application control, micro sd/tf card, fm radio, audio input for pc, cell phones, games Sound mode: stereo Speaker: 40mm custom driver unit Impedance: 32 ohm Sensitivity: 108/-3db Frequency response: 20-20000hz Input power: 3.7 vdc, 200mah, built-in rechargeable lion battery 5v dc 500ma, micro usb charging Bluetooth Version: 4.2 Transmission frequency: 2402 mhz to 2480 mhz Communication rang: 10m (max.) Waiting time: Approx. 48 hours Audio formats: mp3/wav/wma Micro sd card capacity: 32gb (max.) Micro sd card format: fat32 FM Radio frequency range: 88-108mhz Audio input: 3.5mm (do not turn on the device when the aux cable connected) Audio sharing: yes, via 3.5mm aux cable Support App: Scan the code on the box and then you can control the headset with your cell phone. Wired headset: If using an aux cable to listen, turn off the headset first. Specifications of Nia Q1 Over-The-Ear Bluetooth Wireless Headphones SKU 232622347_PK-1451970534 What’s in the box 1 X Nia Q1 Wireless Headphone