Specifications:
Bluetooth version: 4.1
Product type: Dynamic headphone
Speaker diameter: 40mm
Microphone unit: 4 * 1.5mm
Speaker impedance: 32ohm
S.P.L.: 106Db S.P.L. at 1KHz
Frequency response: 20HZ-20,000HZ
Battery capacity: 400mAh
Battery type: Lithium battery
Charging time: 3hours
/music time: Above 8hours
Standby time: 180hours
Transmission distance: 10m/33ft without obstacles
Operating voltage: 3.7V
Charging voltage: Below DC4.7V-6V
Line-in cable length: Approx. 1.2m / 3.28ft
Unfold headphone size: 19 * 19.5 * 7.5cm / 7.5 * 7.7 * 3.0in
Headphone weight: 260g / 9.2oz
Package size: 14 * 8.8 * 18cm / 5.5 * 3.5 * 7.1in
Package weight: 395g / 13.9oz


Package content:
1 * B3506 Bluetooth Headphones
1 * USB Charging Cable
1 * English User Manual
1 * Line-in Cable

• High Definition Stereo Headphones ,Noise Isolation Ear Cups, Dynamic Sound and Deep Bass,High Quality and Power Sound ,Extreme High End Audio Quality ,Superior and High Definition Bass Response
• wireless Bluetooth headphone allows you to sync and pair within seconds for stereo music. Built-in microphone for headset functionality with controls for media and phone calls. Can be used both wired (stereo audio only) and wireless - Optional connection via 3.5mm audio cable for streaming music
• Up to 8 hours playing time and standby time 180 hours. Its closed protein ear cushion blocks noise in almost any environment for better guaranteed comfort.
• Bluetooth/Wired Gaming Headphones: B3506 is not only a Bluetooth headset, but also a wired headset. Compatible with many devices by connecting its included audio cable, such as for iPhone 6 / 6S Plus, Samsung S5, S4, LG, Xiaomi, iPad, PC, laptop, PlayStation 4, etc.

High Definition Stereo Headphones ,Noise Isolation Ear Cups, Dynamic Sound and Deep Bass,High Quality and Power Sound ,Extreme High End Audio Quality ,Superior and High Definition Bass ResponseSummer First