ELPA EWS-01 EWS-10 Wireless Chime Transmitter/Receiver Set ※Transmitter and receiver only (AC adapter, wall mount holder, and batteries are not included) ● Wireless type, so no wiring is required, making installation easy! You can also add more transmitters and receivers to suit your needs. ● Can be used to call between rooms. Convenient for caregiving, etc. ● Equipped with a "battery replacement notification lamp" to indicate when to replace the batteries in the receiver and transmitter. ・Operation confirmed ・Used as a chime between rooms for about a year ※The receiver surface has some sun discoloration (compared in the first image), and the battery compartment of the transmitter shows signs of opening and closing (11th image). Please understand that this is a used item that has been stored by an individual before purchasing. 【Batteries Used】 Receiver EWS-10: AA alkaline batteries x 3 (batteries not included) Pushbutton Transmitter EWS-01: Lithium battery CR2033 x 1 (test battery installed in the main unit. Please replace it soon) Manufacturer Model Number: EWS-01, EWS-10 Receiver Size: Approx. H8.1 x W13.7 x D4cm Pushbutton Transmitter Size: Approx. H9.5 x W4.1 x D2.8cm Receiver Weight: 124g (excluding batteries) Pushbutton Transmitter Weight: 48g (excluding batteries) Material: Receiver (ABS) / Transmitter (Polycarbonate resin) Batteries Used: Receiver: 3 x AA alkaline batteries (sold separately) AC adapter compatible (sold separately) ELPA model number (ACD-045) / Pushbutton Transmitter: 1 x coin-type lithium battery CR2032 (sold separately) Battery Life: Receiver: Approx. 1 year (when used 10 times a day) Pushbutton Transmitter: Approx. 2 years (when used 10 times a day) *Battery life may vary significantly depending on battery performance and usage conditions. Volume: Approx. 70dB/50cm Radio Wave Reach: Approx. 50m (in a clear line of sight) Frequency: 313.625MHz (specified low-power equipment) ID Code: Over 250,000 patterns Operating Temperature Range: 0℃~40℃ Pushbutton Transmitter Waterproof Performance: IP44 (rainproof)