... doorbell,remote doorbell,door chime,battery operated,factory hot sales item,25pcs-Melody optional,chime in 8 languages wireless ... doorbell,remote doorbell,door chime,battery operated,factory hot sales item,25pcs-Melody optional,chime in 8 languagesSpecifications:Remote ... AAA" Battery for Transmitter;Use 3 "AA" battery for Receiver;Battery Stand-By Time: 3-6 Months;ABS Environmental Material, ...