Heine BETA4 SLIM NT bodem insert

HEINE BETA 4 SLIM NT Bottom insert is compatible with HEINE M3Z Li-ion rechargeable battery and SLIM BETA handle module. Ready-to-use Function: Handles switch ON & OFF automatically when placed into charger. Set your desired brightness level once and it stays there every time you use your instrument. Also prevents battery damage and premature bulb burn outs if the instruments are accidentally left on. The charge status indicator in the bottom insert: the indicator shines orange if the battery needs to be recharged. The bottom insert also features an integrated safety system which prevents batteries from completely draining; thus ensuring maximum battery life. Complete HEINE BETA 4 NT Rechargeable 3,5V handles can only be charged in the HEINE NT4 table charger. It is not compatible with older table chargers such as the HEINE NT200 and NT 300.