import { NgZone } from '@angular/core';
import { Observable } from 'rxjs';
export declare enum CompassError {
    COMPASS_INTERNAL_ERR = 0,
    COMPASS_NOT_SUPPORTED = 20
}
export declare class DeviceOrientationService {
    private zone;
    constructor(zone: NgZone);
    getCurrentHeading(): Observable<any>;
    watchHeading(options?: Object): Observable<any>;
}