From Boss:

The OD-1X launches the famous BOSS overdrive into a modern era of expression, delivering an unmatched level of performance for guitarists with an ear for tone. This next-generation stomp combines over 35 years of innovation in pedal design with the most advanced technologies, bringing you a completely new tonal experience that’s only possible with the legendary expertise of BOSS. Prepare to be amazed—the inspiring and ultra-responsive OD-1X will change your thinking about overdrive pedals forever.

Nominal Input Level: -20 dBu
Input Impedance: 1 M ohm
Nominal Output Level: -20 dBu
Output Impedance: 1 k ohm
Recommended Load Impedance: 10 k ohms or greater
Controls: Pedal switch, LEVEL knob, LOW knob, HIGH knob, DRIVE knob
Indicator: CHECK indicator (Serves also as battery check indicator)
Connectors: INPUT jack, OUTPUT jack, AC adaptor jack (DC 9 V)
Power Supply: Alkaline battery (9V, 6LR61) or Carbon-zinc battery (9V, 6F22), AC adaptor (sold separately)
Current Draw: 45 mA
Expected battery life under continuous use: Alkaline: Approx. 9 hours, Carbon: Approx. 2.5 hours
Accessories: Owner's Manual, Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTE," and "Information”), Alkaline battery (9V, 6LR61)