... 5V / 500mAEnvironment -10℃~50℃,0~95%Technical specifications ModelKT5(1A)audio parameterWide band codingG.7222Narrow band codingG.711μ//A,G723.1 ... ,G726,G.729AB,iLBCSupport VAD,CNG,AEC,AGC etc audio processingFull duplex hands-free, with automatic echo cancellationNetwork parameterSupport SIP V1(RFC2543 ...