Williams AV PPA R37-12 PRO 12-Pack FM Receiver BundleNOTE: The Receiver requires a transmitter operating on 72 76 MHz. The receiver is approved by the FCC for operation in U. S. Markets. The receiver cannot be used in all countries. Check with your governments radio regulations for 72 76 MHz operation. The Williams AV PPA R37 12 PRO 12 Pack FM Receiver Bundle comes with 12 FM R37 receivers and a CHG 3512 PRO Twelve Bay Charger. Also includes earphones and a carrying case. The FM R37 features seek button