This is the HBC-3B(4) Battery Charger for the Futaba 4PK Radio System.FEATURES: Overnight wall charger simultaneously charges NiMh transmitter and NiCd receiver batteries used with the 4PK Separate LED charging lights One year limited warranty through manufacturerINCLUDES: Futaba HBC-3B(4) Battery Charger with leads and plugs for transmitter and receiver batteries REQUIRES: Connecting to transmitter and receiver batteries and plugging into wall outlet SPECS:Input: 120V AC, 60Hz, 5W Output: TX, 6 VDC 170mA RX, 6 VDC 100mA COMMENTS: When the charging 4PK batteries allow about 15 hours for charging. If battery has not been used for a while, cycle it by charging and discharging two or three times.