This is the Daytona battery-powered "Kikudake Bluetooth 2". Continuous use: Approximately 12 hours. Standby: Approximately 80 hours. Uses one AAA battery (alkaline batteries recommended). Dimensions: 80mm x 27mm x 21mm Communication distance: Approximately 10m in clear line of sight. Profiles: HSP, HFP, A2DP, AVRCP Bluetooth version: 4.0 High-quality speaker IPX5 equivalent water-resistant specification Multi-pairing compatible This is a simple intercom specifically designed for listening. Bluetooth connection is possible with smartphones, audio devices, navigation systems, and radar detectors. You can connect your iPhone or Android smartphone via Bluetooth and listen to music wirelessly. It features a high-quality speaker that provides sufficient volume to overcome road noise and is designed to be comfortable for long listening sessions. For camping trips without charging facilities, you can carry spare batteries and not worry. Volume adjustment, track forward and back functions are available. The instruction manual is a printout from the internet. This is a used item and shows signs of wear. The battery compartment lid's O-ring may be deteriorated, as it loosens again if closed tightly. Operation has been confirmed. New speaker sponges will be included. Batteries are also included. Price negotiations will result in being added to the blacklist.