This is an ELPA shower radio. I have confirmed that it powers on with batteries inserted. ■Product Contents■ ER-W41F Tuning Method: Digital Reception Frequency: AM: 522～1620kHz FM: 76～95MHz Speaker: 50mm diameter, 8Ω Power Supply: DC3V, 2 x AA alkaline batteries (sold separately) External Dimensions: Width 142 x Height 96 x Depth 49 (mm) Weight: Approximately 247g (excluding batteries) Waterproof Specification: IPX4 (Splash-proof) ※It is not completely waterproof, so do not submerge it in water or use it in places where it will be exposed to large amounts of water. Battery Life (JEITA) When using the speaker: AM: Approximately 39 hours FM: Approximately 39 hours ※When using alkaline batteries ※Battery life may be shorter depending on battery performance and usage conditions. Thank you for viewing.