Product description
The Koss BT539i Wireless Bluetooth Over-Ear Headphones pack powerful wireless sound into a portable, fold-flat unit.
The Koss BT539i Wireless Bluetooth headphones have the natural fitting, iconic ôD-profileö earcup, first featured on the ergonomically designed Koss Pro4AAA and now available on many Koss headphones. The D-profile mimics the shape of the ear, creating an ideal seal for the most consistent sound reproduction.
Listeners can stay connected using the built-in microphone. Easy to locate, on-board controls allow listeners to quickly navigate through songs, play or pause music, volume-up, volume-down, and answer incoming calls.
The built-in rechargeable lithium-ion battery delivers up to 12 hours of play time or 12 hours of call time (at moderate levels) and 40 hours of standby time on a single charge. If the rechargeable battery runs out, the BT539i comes with a detachable analog cord, which can be used as an audio bypass.
Closed ear cushions seal comfortably around the ears to block outside noise and keep music from leaking out. When the music stops, the Koss BT539i Wireless Bluetooth over-ear headphones fold-flat into a convenient size that is easy to carry and even easier to store.
Stay Connected
Built-in microphone
Easy to locate on-board controls
Answer/End Calls
Navigate between your favorite songs
Adjust the volume up or down
Pause your favorite music with one touch
The Sound of Koss
High-Resolution dynamic audio driver
Bluetooth 4.0 technology
12 hours of playtime on one charge
40 hours of standby time on one charge
Analog by-pass if the battery runs out (audio cable included)
Find Your Escape
Unique Koss D-Profile creates the perfect fit
Soft cushions create pillow like comfort
Lightweight for extended use
Designed for On-The-Go
Headphones fold flat for travel
Re-chargeable lithium-ion battery
12-hour battery life
Wireless Freedom
The Original
Ever since John C. Koss invented the world's first SP/3 Stereophone in 1958, Koss Stereophones have been bringing back the excitement of a live performance with the Sound of Koss.
Koss BT539iw Koss BT539ik Koss BT540i Koss Porta Pro Wireless Koss BT190ik
Type Wireless Bluetooth Headphones Wireless Bluetooth Headphones Wireless Bluetooth Headphones Wireless Bluetooth Headphones Wireless Bluetooth Earbuds
Fit Over-Ear Over-Ear Over-Ear On-Ear In-Ear
Connection Wireless Bluetooth Wireless Bluetooth Wireless Bluetooth Wireless Bluetooth Wireless Bluetooth
Bluetooth Version Bluetooth 4.0 Bluetooth 4.0 Bluetooth 4.1 with apt-X Bluetooth 4.1 with apt-X Bluetooth 4.1
Microphone & Controls Built-In Microphone & Controls Built-In Microphone & Controls Built-In Microphone & Controls In-Line Microphone & Controls In-Line Microphone & Controls
Color White Dark Grey Black Black, Silver Black
Cord Detachable (included) Detachable (included) Detachable (included) N/A N/A
Analog Bypass (headphone works when battery dies) Yes Yes Yes