... 13cm (standard) or customize2) Battery: 3.6V3) Power adapter: DC-6V (as options), (If required, please make statement before ordering ... Please make statement before ordering)11) Off-hook signal output: Switch signal output, (If required, please make statement before ordering)12) ... Charger function: 4.2V mobile charger output, (If required, please make statement before ordering)13) ...