Cisco ATA 191, G.711Mu,G.711a,G.726,G.729A,G.729ab, T.38, UL 60950 Second Edition, CAN/CSA-C22.2 No. 60950 Second Edition, IEC 60950-1:2005 (Second Edition)..., CE Markings per directives 2014/30/EU and 2014/35/EU, SIP, TCP, UDP, RTP, HTTP, ARP,...
- Pocket size; Indicator of battery status "goo, low, replace"; For button cells, Micro AAA, Mignon AA, Baby C and Mono D as well as 9 V block Technical details Y Power AA, AAA, C, D