[4-meter Infrared Induction Distance] Detects movement effectively within a wide range.
[Easy Audio Control with A & B Buttons] Conveniently navigate through audio files with simple button presses.
[Supports Mp3 Audio with Dual Volume Levels] Enjoy your favorite tunes with adjustable sound levels.
[Built-in Speaker and Flash Memory] Ensures clear audio and ample storage capacity.
[Two Playback Modes for Flexibility] Choose between continuous loop or single track playback.

Spec:

Features:
Only support to play MP3 audio, two levels of volume are optional.
Human body induction, induction distance up to 4 meters.
Built-in 8Ω1W speaker, built-in 32Mbit (4Mbyte) flash memory.
Two playback modes: full loop playback, single loop playback.
Press the A button to play the previous audio and the B button to play the later audio.
Download audio files from your computer via the USB interface.
Power supply mode: three AAA batteries or USB power supply.
Specifications:
Condition: Brand New
Material: ABS
Color: White
Power Supply: USB/3 x AAA batteries (excluded)
Audio: Only support MP3
Volume: Two levels
Detection Distance: Maximum 4m
Speaker: Built-in 8Ω 1W speaker
Memory: Built-in 32Mbit)4Mbyte)flash memory
Memory Expansion: Not Support
Package List:
1 x Motion Sensor Doorbell
1 x Bracket
2 x Stickers