Long-lasting battery: about 4 hours talk/music time (work time varies according to the volume level and audio content). Only need about 1.5 hours to fully charge, the Wireless headphone can stand by as long as 40 hours.
Widely Compatibility: work with most portable devices, such as Android and iOS system Phones, PC and Tablets. Super easy to answer or end phone calls, pause/play music, support switch of previous/next song.
Support 4 Playing Modes: Equipped with Wireless mode, Micro SD Card playback mode, FM radio mode and Line-in Mode. Playing music (MP3/WAV/WNA/APE/FLAC) or listening to radios either way you like.
Sturdy and Durable: Firm ergonomic headband design makes it comfortable to wear; scientific and rational earmuffs adapt to different head shapes.
Support for V2.1: provides steady signal within 10 meters. 12 months 100% risk-free seller warranty guarantee for your purchase.
The over-ear headphones develop a rich, deep high quality sound. With a softly padded headband and memory foam ear cushions, it stays comfortable over your ears. You can enjoy your own quiet time with the active noise cancelling headphones or listen to your favorite music or have a phone talk with your business partners/friends.
Four modes of using this over-ear headphone
1. The Wireless mode: a built-in rechargeable 300mAH battery provides up to 4 hour music / talking time in a single charge.
2. The Wired mode: you can also use it as a wired headphone with the provided AUX cable so the headphones will never power off.
3. Micro SD Card Playback mode: insert a Micro SD card and you can play music in the SD cards.
4. The Radio mode: you can switch the headphone into radio mode and listening to local radio stations.
Support Profile: AVRCP1.3, A2DP1.0, HFP1.5, HSP1.0
Working Distance range: 10m
Frequency Range: 2.402GHz-2.480GHz
Battery Specifications: 3.7V, 300mAH, built-in recharegable lithium battery
Charging Voltage: DC4.2 -5.5V
Charging time: about 1.5 hours
Talking/Music Time: about 4 hours
Standby Time: about 30 hours
1 x Over-ear Headphone
1 x USB Cable
1 x AUX-in Cable
1 x Manual
Alltrum Over-Ear Headphones Wireless Headsets Built-in Microphone Support SD Card (AB blue19) - B078T8Z6M5