Sony DR-BT21iK Manuale Utente

DR-BT21iK [US, ES] 3-280-325-52(1)

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 Bluetooth wireless technology operates 

within a range of about 10 meters 

(about 30 feet).  

Maximum communication range 

may vary depending on obstacles 

(human body, metal, wall, etc.) or 

electromagnetic environment.

The transmitter

Limited performance

Optimal performance

Steel cabinet

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 The aerial of the headset is built into 

the right housing as illustrated in the 

dotted line.

Location of 

built-in aerial

 

The aerial of the transmitter is shown 

as illustrated in the dotted line.

Location of 

built-in aerial

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The sensitivity of the Bluetooth 

communication will improve by 

turning the direction of the built-in 

aerial to the connected Bluetooth 

device. 

The communication distance shortens 

when the obstacles are between the 

aerial of the connected device and this 

product.

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 The following conditions may cause 

noise, sound break or playback speed 

change.
– When using inside the metal bag.
– When using inside the backpack or 

shoulder bag.

– A device using 2.4 GHz frequency, 

such as a wireless LAN device, 

cordless telephone, or microwave 

oven, is in use near this product.

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 Because Bluetooth devices and wireless 

LAN (IEEE802.11 b/g) use the same 

frequency, microwave interference may 

occur and resulting in communication 

speed deterioration, noise, or invalid 

connection if this product is used near 

a wireless LAN device. In such a case, 

perform the following.
– Install this product and Bluetooth 

device as near to each other as 

possible.

– If this product is used within about  

10 meters (about 30 feet) of a 

wireless LAN device, turn off the 

wireless LAN device.