You may check CBP web site for detail.
+!D=SnBGs *1%e%G
http://www.cbp.gov <aD'$(N5 &IIJKn|_ The following is mentioned in U.S. Customs and Border Protection Declaration Form
PEK.Kt\M pW`ntE#L Money And Other Monetary
':5Trx Instruments
A&xab You may bring into or take out of the country, including
>cC Gx by mail, as much money as you wish. However, if
`8.1&fBr it is more than $10,000, you will need to report it to
]:[)KZ~ CBP. Ask the CBP officer for the Currency Reporting
c8H9_6 Form (FinCen 105). The penalties for non-compliance
XL{{7%j can be severe.
n U+pnkMj “Money” means monetary instruments and includes U.S.
nYmf(DV or foreign coins currently in circulation, currency, travelers’
y^5T/M checks in any form, money orders, and negotiable
MH C.k= instruments or investment securities in bearer form.