Product details of NIA X1 Bluetooth Wireless Headphones Frequency range: 20-20KHz Speaker diameter: 40 mm Impedance: 32O Maximum absorbed power: 50 mW Sound pressure: 108 dB ± 3 dB Talk time: 5 hours Music playing time: 5 hours TF card playing time: 4 hours Radio time: 6 hours Standby time: 200 hours Battery type: Li- Polymer Charging time: 2 hours Bluetooth version: 4.2 Transmission range: 10 m (32.8 feet) Connectors: 3.5 mm Call control: yes Volume control: Yes Built-in microphone: Yes Audio format support: MP3, WMA, WAV TF card volume support: 128 MB-32 GB Advanced Technology & High-quality Sound: Bluetooth4.0 for steady Bluetooth signal to support connecting devices over 33 feet away; Rich and textured Sound as well as powerful Bass reproduced by 40mmdynamic driver. Long Battery Life & Dual Mode: Up to 8-12 hours of music time, with a cable it can be a wired headphone without battery consumption. Fast Charging Time: It wouldn’t do if the battery life was no good; the NIA-X1 headset comes with high quality battery that charges quickly, we are talking an hour and 30 minutes. After it is fully charged, you can enjoy listening to music for 20 hours continuously without a break. Function 4-in-1: Bluetooth stereo, TF card play, FM Stereo Radio and Audio input 4-in-1 headphones will be your best companion for music, movie and games Designed for Maximum Comfort: NIA-X1 wireless headphone is elegantly designed for optimum comfort. The foldable headband of the headset fits comfortably on the head. You can enjoy listening to high quality sound for long hours at a time without feeling any discomfort. Specifications of NIA X1 Bluetooth Wireless Headphones SKU 232583584_PK-1451932428 What’s in the box 1 X Nia X1 Bluetooth Headphones VIEW MORE