... are available:: Can choose many kinds of requesters: HY-2610A, HY-2610B, HY-2610C, HY-2610E 1-button requester can transmit 1 request ... message (service); 2-button requester can transmit 2 request messages (service ... defined as needed such as call, drink, cashier, etc. 2) If wide signal coverage is needed, we have signal enhancers ...