PORTLAND — An Auburn man charged with selling nearly 25 grams of crack cocaine over two meetings with an undercover buyer admitted Tuesday to two federal felonies.

Pierre Calhoun, 39, appeared in U.S. District Court, dressed in a tan jail suit and bright orange canvas shoes.

He pleaded guilty to two charges of distribution and possession with intent to distribute controlled substances, each crime punishable by up to 20 years in prison and up to a $1 million fine.

Calhoun also faces at least three years of supervised release on each count after release from prison.

He had not reached a plea agreement with prosecutors before admitting to the two crimes Tuesday, Assistant U.S. Attorney Noah Falk said.

On May 16, the confidential source paid Calhoun paid $800 for 10 grams of crack cocaine, Falk wrote in court documents.

On June 13, the confidential source met with Calhoun and paid him $1,000 for 14.7 grams of crack cocaine, Falk wrote.

The confidential source showed federal agents the texts exchanged between him and Calhoun before each of the drug buys, which took place in Lewiston, according to U.S. Drug Enforcement Administration Special Agent Robert Brooks.

In each instance, the controlled purchase was surreptitiously video and audio recorded by the DEA and monitored from nearby locations.

The seized drugs were later tested by the DEA lab and confirmed to be crack cocaine, Brookes wrote in an affidavit.

Calhoun’s sentencing will be scheduled after a presentencing investigation report is prepared by a probation officer, the judge said.