SHURE SLX2/SM58

System performance
Range: approximately 60m in an unobstructed outdoor location; varies with conditions.
Frequency response: 45Hz–15kHz, ±2dB (overall system bandwidth depends on the microphone capsule)
Transmitting frequency: any one of 30 Type B channels (806–810MHz)
Emission type: F3E
RF output power: 10mW
Antenna type: built-in whip, 50Ω
Tone signal frequency: 32.768kHz
Maximum input level: +2dBV (with gain switch set to −10dB)
Gain adjustment: Pad (0 / -10dB)
Power: 2 × AA alkaline batteries or 2 × AA NiMH rechargeable batteries
Battery life: approximately 8 hours with alkaline batteries; varies with conditions.
SLX2/SM58 dimensions: maximum diameter 51mm × overall length 254mm
Weight (excluding batteries): 290g