1、Low energy consumption device of the switch circuit, please remove the battery when not in use. 2、All internal and external structural parts are made of ABS engineering plastics, and the surface is black rubber non‑slip paint. 3、The waveform distortion of headphones is less than 0.6%, the sound quality is clear and records the bird noise well. 4、Portable, easy to carry, will not burden you while watching birds, allow you to experience life better. 5、This product contains telescope and headphones, a good tool for bird watching, allow you to hear the sound of birds while watching. Condition: 100% Brand New Item Type: Birdwatching Tool Material: Aluminum alloy mirror tube, optical glass lens, surface plated anti-reflection film and wide band film, rubber anti-slip paint, ABS, rubber non-slip paint Color: As shown in the picture Product Size: Approx. 26 x 17 x 6.5cm / 10.2 x 6.7 x 2.6in Power Supply: 1 x 9V Battery (Battery not included) The normal working voltage of power supply is not less than 6V Telescope specifications: 8x21 focusing telescope with eye masks Effective Observation Distance: 5 meters to boundless Resolution: 10~11in high definition Field of View: 7.5° Directional Listening Distance: 200 meters in a quiet wild environment, with eliminating environmental noise treatment Volume adjustment: Continuously adjustable Audio Frequency Range: 20~20000Hz Waveform Distortion: Less than 4% Sensitivity: -60~-50dB Recording: The recording time is more than 5 hours Replaying: Recording replaying accuracy ≥0.3% Transcription: Self-purchased memory card reader, can transcribe recordings to computers and other audio equipment. See instructions for operation.Weight: Approx. 555g / 19.6oz 1 x Main Body (Battery Not Included) 1 x Headphone 1 x Sound Collection Cover 1 x Lens Cleaning Cloth 1 x User Manual 1 x Cloth Bag