Replacement battery for Toitu FD390 Doppler. Specifications: 700 mAh, 9.6V, Ni-MH. Compatible with: Toitu FD390 Doppler, Toitu FD390, FD390, FD-390. Replaces: Toitu 6075, Doppler 6HR-4UC. Doppler replacement battery designed for Medical devices. Perfect for professional or everyday use.