Both of the BLX2 handheld transmitters have a 300' line of sight operation range with the BLX88 receiver. They are each powered by two included AA batteries that can provide up to 14 hours of operation. The BLX88 receiver features microprocessor-controlled internal antenna diversity that helps prevent interference and signal dropouts. Its one-touch QuickScan feature detects the most interference-free frequency and sets the channel to it for fast setup. The PG58 microphone features an on/off switch on the mic body and is tuned for vocal applications.