Youkey Q7, Instructions For Use Manual

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Appendix A Names and contents of toxic and
hazardous substances or elements
Table ： Names and contents of toxic and hazardous substances or elements
Toxic or
hazardous
substances
or elements
Toxic or hazardous substances or elements
lead
（
Pb
）
mercury
（
Hg
）
cadmium
（
Cd
）
Hexavalent
chromium
（
Cr(VI)
）
Polybromin
ated
biphenyls
（
PBB
）
Two
phenyl
ether
（
PBDE
）
Internal
wire rod
× ○ ○ ○ ○ ○
LCD
○ ○ ○ ○ ○ ○
Button/Pol
ybrominate
d biphenyls
○ ○ ○ ○ ○ ○
Shell(Plasti
c cement)
○ ○ ○ ○ ○ ○
Shield ○ ○ × × ○ ○
PCBA
× ○ ○ ○ ○ ○
○：
Said the content of toxic and harmful substances in all homogeneous materials in the parts of
the SJ/T11363-2006 in the specified limits requires the following.
×：
The toxic and harmful substances exceeded the limitation of SJ/T11363-2006 standard in the
content of at least one of the homogeneous materials.
Appendix B Acoustic output data
The meaning of each symbol in the sound output table ：
Symbol Meaning
Α
Acoustic attenuation coefficient
A
aprt
-12dBOutput acoustic beam area
D
eq
Equivalent pore diameter
d
eq
Equivalent sound beam diameter
f
awf
Sound working frequency
I
pa
Pulse average sound intensity
I
pa,α
Average sound intensity after
attenuation
I
pi
Impulsive sound intensity integral
I
pi, α
Pulse sound intensity integral