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1. Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the

manufacturer. Dispose of used batteries according to the manufacturer's lnstructions. 

2. The lithium battery is a critical component (type No.CR23541). Please observe for the proper polarity and the exact location

when replacing it and soldering the replacement lithium battery in.

These symbols ((1), (2), (3)) on the products, packaging, and/or accompanying documents mean that used electrical and elec-
tronic products and batteries should not be mixed with general household waste.
For proper treatment, recovery and recycling of old products and used batteries, please take them to applicable collection 
points, in accordance with your national legislation and the Directives 2002/96/EC and 2006/66/EC.
By disposing of these products and batteries correctly, you will help to save valuable resources and prevent any potential nega-
tive effects on human health and the environment which could otherwise arise from inappropriate waste handling. For more 
information about collection and recycling of old products and batteries, please contact your local municipality, your waste dis-
posal service or the point of sale where you purchased the items.
Penalties may be applicable for incorrect disposal of this waste, in accordance with national legislation.

If you wish to discard electrical and electronic equipment, please contact your dealer or supplier for further information.

These symbols ((1), (2), (3)) are only valid in the European Union. If you wish to discard these items, please contact your local 
authorities or dealer and ask for the correct method of disposal.

This symbol ((2)) might be used in combination with a chemical symbol ((3)). In this case it complies with the requirement set by 
the Directive for the chemical involved.

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The power socket wall outlet should be located near this equipment and be easily accessible.

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In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that con-
tains lead.
We will use PbF when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn), Silver,
(Ag), and Copper, (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder. 

• PbF solder has a melting point that is 50° ~ 70° F, (30° ~ 40°C) higher than Pb solder. Please use a soldering iron with tempera-

ture control and adjust it to 700° ± 20° F, (370° ± 10°C). 
Exercise care while using higher temperature soldering irons.:
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.

• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (600°C).
• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the

opposite side (See figure, below).

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There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac
turer's specific instructions for the melting points of their products and any precautions for using their product with other 
materials. 
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.

When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.