BQ - 618 Wireless Bluetooth V4.1 + EDR Headset At home or on the go your BQ - 618 smart wireless headphones give you the ideal combination of sound quality and convenience. They use Bluetooth technology so you can connect to both your tunes and your friends with ease, live the beat, every note, everywhere. Highlights: Bluetooth Version: V4.1 + EDR. Hi-Fi sound effect and wonderful music feeling. Built-in microphone supports digital signal processing echo cancellation technology. Intelligent voice navigation, gives you full VIP-like experience. Professionally tunes for superior acoustics. Adjustable headband for your more suitable wearing. Listen and chat longer with a 20-hour rechargeable battery. Be comfortable with these light-weight, adjustable headphones. Supports 3.5mm stereo audio input. Supported profiles: HFP, A2DP, AVRCP. Model : BQ - 618 Color : Black, White Wearing type : Headband Function : HiFi, Voice control, Answering phone, Bluetooth, Song switching, Noise Cancelling, Microphone Connectivity : Wireless Application : DJ, Portable Media Player, Mobile Phone, Aviation, Computer, Sport Plug Type: AUX-IN Frequency response : 20~20KHz Working voltage: DC5V / 500mA Working time: 10 hours Talk Time: 15 hours Music Time: 20 hours Charging time: 2.5 hours Bluetooth: Yes Bluetooth version: V4.1 + EDR Bluetooth protocol: AVRCP, HFP, A2DP Package weight: 0.227 kg Product size (L x W x H) : 16.5 x 14.0 x 2.6 cm / 6.48 x 5.50 x 1.02 inches Package size (L x W x H) : 19 x 16 x 5 cm / 7.47 x 6.29 x 1.97 inches Package contents 1 x BQ - 618 Smart Wireless Bluetooth V4.1 + EDR Stereo Headphones with MIC Support 3.5mm Stereo Audio Input, 1 x 3.5mm AUX Audio Cable, 1 x USB Charging Cable, 1 x Bilingual User Manual in English