Echo-BlindDog offers three operating modes: pause mode (1), indoor mode (2), and outdoor or active mode (3). The indicator light indicates the current mode. The user can switch between modes by pressing the mode selector button. On reception, Echo-BlindDog is in pause mode (mode 1): – No sound emissions. – No signal from the indicator lamp is emitted. Pressing the mode selection button once switches to mode 2: – One (1) flash of the indicator lamp indicates the selection of “Mode 2”. – Then, the indicator light emits regular, slow flashes. – The box starts to emit sound signals in “indoor mode”. Pressing the mode selection button again switches to mode 3: – Two (2) flashes of the indicator lamp signal the selection of “Mode 3”. – Then, the indicator light emits regular and rapid flashes. – The box then emits sound signals in “external or active mode”. For the comfort of your companion, be sure to manually return to mode 2 when returning indoors. If you forget, active mode is automatically deactivated after 40 minutes to automatically return to mode 2. By pressing the mode selection button again, you return to mode 1: – Three (3) flashes of the indicator lamp indicate the selection of “Mode 1”. -No signal from the indicator lamp is emitted. – No sound emissions are detected.