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Sony MDR-RF840RK Black Circumaural headphone

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Product name:
Product name is a brand's identification of a product, often a model name, but not totally unique as it can include some product variants. Product name is a key part of the Icecat product title on a product data-sheet.
Article code :
The brand's unique identifier for a product. Multiple product codes can be mapped to one mother product code if the specifications are identical. We map away wrong codes or sometimes logistic variants.
Headphones come in all sorts of designs and qualities, so you will surely be able to find your perfect pair in our database!
Data-sheet quality: created/standardized by Icecat
The quality of the data-sheets can be on several levels:
only logistic data imported: we have only basic data imported from a supplier, a data-sheet is not yet created by an editor.
created by Sony: a data-sheet is imported from an official source from a manufacturer. But the data-sheet is not yet standardized by an Icecat editor.
created/standardized by Icecat: the data-sheet is created or standardized by an Icecat editor.
Included since: 07 Mar 2007
The date Icecat noticed for the first time that this product was included in the price list of a channel partner
Product views: 57086
This statistic is based on the 75034 using ecommerce sites (eshops, distributors, comparison sites, ecommerce ASPs, purchase systems, etc) daily downloading this Icecat data-sheet since 07-03-07 Only sponsoring brands are included in the free Open Icecat content distribution as used by 73322 free Open Icecat users.
Info modified on: 09 Dec 2017 04:21:39
The date of the most recent change of the data-sheet in Icecat's system
Long product name Sony MDR-RF840RK Black Circumaural headphone :
The short editorial description of Sony MDR-RF840RK Black Circumaural headphone

MDR-RF840RK - Wireless headphone system with long battery life and 100m range

Sony MDR-RF840RK Black Circumaural headphone:
The official marketing text of Sony MDR-RF840RK Black Circumaural headphone as supplied by the manufacturer
- Transmission range up to 100m allowing the freedom to move about at your leisure.
- 40mm driver units for deep bass response.
- Hassle-free recharging by placing the headphones on the dock (headphone charged via electromagnetic induction).
- Automatic On/Off for headphones making your batteries last longer.
- Rechargeable Battery will keep the music going.
- Battery playback time up to 15 hrs with rechargeable batteries or 28 hrs with Sony Alkaline batteries.
- Rotary Volume Control on Headphones.
Short summary description Sony MDR-RF840RK Black Circumaural headphone:
This short summary of the Sony MDR-RF840RK Black Circumaural headphone data-sheet is auto-generated and uses the product title and the first six key specs.
Sony MDR-RF840RK , Circumaural, Wireless, 20 - 20000 Hz, 10.6 oz (300 g), Black
Long summary description Sony MDR-RF840RK Black Circumaural headphone :

Sony MDR-RF840RK . Ear coupling: Circumaural, Headphone frequency: 20 - 20000 Hz, Driver unit: 1.57" (4 cm), Magnet type: Ferrite. Wireless range: 3937" (100 m). Battery life (max): 28 h. Weight: 10.6 oz (300 g). Color of product: Black

This is an auto-generated long summary of Sony MDR-RF840RK Black Circumaural headphone based on the first three specs of the first five spec groups.
Ear coupling *
Headphone frequency *
20 - 20000 Hz
Driver unit
1.57" (4 cm)
Magnet type
Ports & interfaces
Connectivity technology *
Wireless range
3937" (100 m)
Color of product *
Battery life (max)
28 h
Battery technology
Nickel-Metal Hydride (NiMH)
Number of batteries supported
Battery type
Weight & dimensions
Weight *
10.6 oz (300 g)
Other features
Wireless technology
Dimensions (WxDxH)
4.41 x 9.65 x 12.2" (112 x 245 x 310 mm)
Source Testseek summary Average rating
Testseek has collected 3 expert reviews for Sony MDR-RF840RK and the average expert rating is 74 of 100. The average score reflects the expert community’s view on this product. Click below and use Testseek to see all ratings, product awards and conclusions.
Country Distributor
España 1 distributor(s)