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Specification
Price
Rs.3,000.00
Rs.3,000.00
Brand
Koss
Koss
Model No
X Retrospekt P/21 Retro
BT221i
Wired / Wireless
Wireless Headphone Specification
Wireless Headphone Specification
Headphone Type
On Ear
Ear Clip
Magnet Type
Dynamic
Dynamic
Driver Diameter
30 mm
NA
Impedance
32 Ohms
36 Ohms
Sensitivity
104 dB SPL
101 dB SPL
Frequency Response
30Hz - 17KHz
50Hz - 18KHz
Maximum Power Input
NA
NA
Wireless / Bluetooth Details
Wireless Technology
Wired
Bluetooth
Bluetooth Version
5.2
Compatible Profiles
All Bluetooth Devices
Supported Codecs
SBC
Battery Type
Lithium-ion Batteries
Bluetooth Range
10 Meters
Battery Life
18+ Hours
Charging Time
6 Hours
Noise Cancelling
Sound Isolation
Sound Isolation
Available Colors
Orange
Black
Connector Plating
3.5mm Gold-Plated Stereo
NA
Cable
Straight, Dual Entry Cable
USB Type-C Charging Cable
Weight
200 GM
60 GM
Other Features
Integrated size-adjustable headband.
Durable, ultra lightweight stainless steel design.
Hear-through open-back design that delivers an exceptional, expansive listening experience.
International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.
Featuring incredibly spacious sound and a classic retro look, the all-new Koss x Retrospekt Retro On-Ear Headphone is designed for portable on-the-go listening. Whether you're listening on a newly restored cassette player, boombox or portable game system or on a modern smartphone or computer, the Koss x Retrospect On-Ear Headphone will have heads turning while they're on your head.
The Koss BT221i Wireless Bluetooth® On-Ear Clip Headphones feature 18+ Hour Battery, USB-C charging and In-Line Microphone with Remote for controlling music. Connect via Bluetooth® version 5.2. Pivoting ear-clip creates the perfect fit and seal Sweat Resistant Cable Management Clip.
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Top Differences

  • Driver Size: 30 mm vs NA
  • Weight: 200 GM vs 60 GM
  • Impedance: 32 Ohms Vs 36 Ohms
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