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request a password, but if there is a need (special design of some cell phones), please use the 
password "0000". 
 
2. In the music playing mode, when there is an incoming call, this unit will automatically switch to 
telephone mode. 
 

Bluetooth calling

 

1.

 

Press

to answer the incoming call, press

and hold for 3 seconds to reject the incoming call. 

2.

 

Press

to hang off a call. 

3.

 

Press

twice to dial the last number automatically, press

again to cancel the current dialing.   

4.

 

Long press the 

  button to change audio output from your cellphone or car stereo system 

during calling. 
5.

 

When making a call, you can only dial the phone number by your mobile phone, but once the 

call connected, you can use the hands-free function to enjoy it. 
 

 

 

 

 

 

     

NOTE: This equipment has been tested and found to comply with the limits for a 

 

Class B digital device, pursuant to part 15 of the FCC Rules. These limits are 

 

designed to provide reasonable protection against harmful interference in a 

 

residential installation. This equipment generates uses and can radiate radio 

 

frequency energy and, if not installed and used in accordance with the instructions, 

 

may cause harmful interference to radio communications. However, there is no 

 

guarantee that interference will not occur in a particular installation. If this 

 

equipment does cause harmful interference to radio or television reception, which 

 

can be determined by turning the equipment off and on, the user is encouraged to 

 

try to correct the interference by one or more of the following measures:   
 
- Reorient or relocate the receiving antenna. 

 

- Increase the separation between the equipment and receiver. 

 

-Connect the equipment into an outlet on a circuit different from that to which the 

 

receiver is connected. 

 

-Consult the dealer or an experienced radio/TV technician for help   
 
Changes or modifications not expressly approved by the party responsible for compliance 

 

could void the user's authority to operate the equipment. 

 

This device complies with Part 15 of the FCC Rules. Operation is subject to the following 

 

two conditions: 

 

(1) this device may not cause harmful interference, and 

 

(2) this device must accept any interference received, including interference that may 

 

cause undesired operation. 

 

 

Summary of Contents for BT21L

Page 1: ... s stereo system and most of functions are achieved by the rotation knob Please read the User Manual carefully before using Hope this device makes your driving more interesting and safer Packing contents Bluetooth device User Guide Specification Bluetooth version JL V4 2 Bluetooth Protocol AVRCP HFP A2DP Frequency range 88 1 107 9MHZ Frequency stability 10ppm Product Input 12 24V Music Format MP3 ...

Page 2: ...s Please read all safety instruction warnings carefully before using this product Improper use of this product may result in damage to this or attached products To ensure the products work well please never use this in the following conditions 1 Moist or underwater conditions 2 Conditions near heater or high temperature service 3 Conditions with direct and strong sunshine 4 Never dismantle the pro...

Page 3: ...he Fig 2 Fig 3 as below to control your music easily Fig 2 Fig 3 Using Bluetooth function 1 Using Bluetooth for the first time you need to pair your mobile phone with this unit Activate your mobile phone s Bluetooth function then search new device When the mobile phone detects this unit named as BT21L normally the connection will be set up automatically and doesn t ...

Page 4: ...es uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and ...

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