AKG 864 MHz single UHF HiFi headphones AKG-K 206-H Convenient, cordless charging - just place headphones on the transmitter auto-tuning feature for reliable reception at the push of a button a single transmitter can be used with several headphones. Approximately 15 hours battery life NiMH rechargeable batteries 3-in-1 transmitter design integrates battery charger and storage cradle for