BS121 Date and Time Event date: Location Single-channel 2.4GHz Base Station Event Types Products, DX Series Digital Wireless Systems, Base Stations, Wireless, DX121 Digital Wireless Systems, Base Station 2.4GHz license-free operation 1 full-duplex and 3 additional push-to-transmit beltpacks Up to 8 systems can be linked together Interface option available to 4-wire intercom systems only Portable, compact design Built-in battery charger