Cheap And Discounts 1W SA818S Wireless Analog Talkback module 1W SA818S Wireless Analog TalkbWireless phone Talkback module embedded UHF VHF 350MHz Wholesale. Buy Directly From Merchant HONG KONG CCD LIMITED. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.