ER-5700 Power Card autonomously developed real-cluster wireless receiver; optionally selected with a speaker, belt-bag-leaded speaker or headset speaker, desktop neck-cluster speaker; hand-cluster receiver with the latest technology in automatic silencing, free fall silencing, automatic shutter functionality. At the level of the speaker or less than 45 degrees, the speaker is automatically silenced for 5 seconds
ER-5700  力卡自主研發的真分集無線接收機；可隨意選配手持話筒、腰包領夾話筒或頭戴話筒、桌面鵝頸會議話筒；
手持話筒采用最新技術的自動靜音、自由跌落靜音，自動關機功能。（話筒水平或小于45度角放置靜止5秒鐘時話筒自動靜音，靜止10分鐘時話筒自動關機，從高處跌落時話筒自功靜音。為用戶提供智能化省電、人性化應用。）
采用真正分集FM超外差式接收，保證接收RF信號的穩定性和接收機自身的抗干擾性；工作頻率范圍在522MHz~936MHz根據各國的無線電波管制法律法規而定；
接收機選用了電子音量調節，調節范圍：-6d