You may check CBP web site for detail.
C=>B_EO q&u$0XmV http://www.cbp.gov uVN.= ?V#Gx>\ The following is mentioned in U.S. Customs and Border Protection Declaration Form
VVs{l\$=ZV 4Z*|Dsw Money And Other Monetary
Hab!qWK` Instruments
48wDf_<f5= You may bring into or take out of the country, including
hZ!oRWIU%G by mail, as much money as you wish. However, if
66oK3%
[ it is more than $10,000, you will need to report it to
j.
_G7z/LJ CBP. Ask the CBP officer for the Currency Reporting
M[A-1]' Form (FinCen 105). The penalties for non-compliance
{J{1`@ can be severe.
0r1g$
mKb “Money” means monetary instruments and includes U.S.
jyNb(Z or foreign coins currently in circulation, currency, travelers’
m'd^?Qc checks in any form, money orders, and negotiable
f.@Xjf instruments or investment securities in bearer form.