Welch Allyn/Hillrom-79290 Universal Desk Charger with Pocketscope Adapter Sleeves (Each)Welch Allyn Hillrom 79290 Universal Desk Charger with Pocketscope Adapter Sleeves Colored LEDs indicate power to the unit and that handles are charging Advanced circuitry for constant automatic safe charging and optimum lamp performance and life Compact for convenience and mobility Accepts 3. 5 V or 2. 5 V well rechargeable NiCad handles, Lithium Ion Handle and PocketScope handles (only PocketScope handles require the adapters)