KEYES Button Battery Board Coin Cell Module Wearable CCR-2004 Description: This product is compact and lightweight, with a two tranches toggle switch Rated voltage: 0 to 1000V Operating temperature range: -30 to 125 C Two tranches toggle switch of action: Switch to "ON", indicates that the module output power ON Switch to "OFF", indicates that the module output power OFF Applicable battery type: BR2025 CR2025 BR2032 CR2032 Package includes: 1 x Coin Cell Module (battery does not includes)