Type:Audio Conference System Function:Translation Simultaneous Interpretation:Yes Operation frequency:793~810Mhz,863~865Mhz Storage channel:20,32,99 channels Language translation:6 language interpretation simultaneously LCD display:volume and channel Battery type:Built-in lithium battery or AAA batteries Talk range:150m line of sight Battery life:15-20 hours continuous work Mic type:Headset microphone or lapel microphone Earphone type:in-ear earphone or earpiece earphone Warranty:24 months Show More