You may check CBP web site for detail.
zMIT}$L oYWR')8g http://www.cbp.gov m*e{\)rd# :akT 'q# The following is mentioned in U.S. Customs and Border Protection Declaration Form
TW !&p"Us+ -}K<ni6 Money And Other Monetary
"#mBcQ;QLV Instruments
%;#^l+UB You may bring into or take out of the country, including
B|o2K}%f by mail, as much money as you wish. However, if
}68i[v9Njk it is more than $10,000, you will need to report it to
iy
""(c CBP. Ask the CBP officer for the Currency Reporting
?UM*Xah Form (FinCen 105). The penalties for non-compliance
=PGs{?+&O can be severe.
6TP7b| “Money” means monetary instruments and includes U.S.
Em[DHfu1Q or foreign coins currently in circulation, currency, travelers’
0"~i
^ checks in any form, money orders, and negotiable
P`r55@af4 instruments or investment securities in bearer form.