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M-207FMP3 player,Wireless MP3 download enable doorbell chime Unique design idea,suits for different tastes; Multi-functions as MP3 player or wireless digital doorbell chimes; MP3 player powered by 3 X AAA1.5V batteries (not included) OR USB cable(included) optional; MP3 player includes Exquisite buttons,with different functions,easy operation, free choice; Inner Memory:128M (can change bigger memory capacity according to buyers needs); Download MP3 musics; Built-in Hi-Fi low-tone speaker, make music more graceful, more shock; Can edit the MP3 musics as chime sounds, sweet MP3 music replaces monotone door chime sounds; Four Transmitters optional, operated by 23A 12V battery (included) Under MP3 player,Press the transmitter,also sound door chimes, Never miss your visitors Digital code system,long remote distance,but never interference with neighbours chimes Over 100m distance in open air(Metal frames and walls will reduce the operating distance) Suitable for home, office,travelling, enriching your daily life. Water-resistant transmitter can be mounted indoors or outdoors Frequency: 315MHz OR 433MHz Each set packed in a double side heat sealed blister packing,10 sets/innerbox;40 sets/outer carton. MP3 player/receiver dimensions:100x100x80mm Bell Push Dimensions - 78 x 43 x 20mm M-207AMP3 player,Wireless MP3 download enable doorbell chime Unique design idea,suits for different tastes; Multi-functions as MP3 player or wireless digital doorbell chimes; MP3 player powered by 3 X AAA1.5V batteries (not included) OR USB cable(included) optional; MP3 player includes Exquisite buttons,with different functions,easy operation, free choice; Inner Memory:128M (can change bigger memory capacity according to buyers needs); Download MP3 musics; Built-in Hi-Fi low-tone speaker, make music more graceful, more shock; Can edit the MP3 musics as chime sounds, sweet MP3 music replaces monotone door chime sounds; Four Transmitters optional, operated by 23A 12V battery (included) Under MP3 player,Press the transmitter,also sound door chimes, Never miss your visitors Digital code system,long remote distance,but never interference with neighbours chimes Over 100m distance in open air(Metal frames and walls will reduce the operating distance) Suitable for home, office,travelling, enriching your daily life. Water-resistant transmitter can be mounted indoors or outdoors Frequency: 315MHz OR 433MHz Meets CE,FCC,UL,RoHS approvals Each set packed in a double side heat sealed blister packing,10 sets/innerbox;40 sets/outer carton. MP3 player/receiver dimensions:100x100x80mm Bell Push Dimensions - 56 x 39 x 21mm M-203FMP3 player,Wireless MP3 download enable doorbell chime Unique design idea,suits for different tastes; Multi-functions as MP3 player or wireless digital doorbell chimes; MP3 player powered by 4 X AAA1.5V batteries (not included) OR USB cable(included) optional; MP3 player includes Exquisite buttons,with different functions,easy operation, free choice; Inner Memory:128M (can change bigger memory capacity according to buyers needs); Download MP3 musics; Built-in Hi-Fi speaker, Stereophonic sounds, make music more graceful, more shock; Can edit the MP3 musics as chime sounds, sweet MP3 music replaces monotone door chime sounds; Four Transmitters optional, operated by 23A 12V battery (included) Under MP3 player,Press the transmitter,also sound door chimes, Never miss your visitors Digital code system,long remote distance,but never interference with neighbours chimes Over 100m distance in open air(Metal frames and walls will reduce the operating distance) Suitable for home, office,travelling, enriching your daily life. Water-resistant transmitter can be mounted indoors or outdoors Built-in a LED indicator, contains seven colors alternated, when the door chime or MP3 music sounded, the LED indicator will light and change different colors Frequency:315MHz OR 433MHz Each set packed in a double side heat sealed blister packing,10 sets/innerbox;40 sets/outer carton. MP3 player/receiver dimensions:185x 45x 50 mm Bell Push Dimensions - 78 x 43 x 20mm M-203AMP3 player,Wireless MP3 download enable doorbell chime Unique design idea,suits for different tastes; Multi-functions as MP3 player or wireless digital doorbell chimes; MP3 player powered by 4 X AAA1.5V batteries (not included) OR USB cable(included) optional; MP3 player includes Exquisite buttons,with different functions,easy operation, free choice; Inner Memory:128M (can change bigger memory capacity according to buyers needs); Download MP3 musics; Built-in Hi-Fi speaker, Stereophonic sounds, make music more graceful, more shock; Can edit the MP3 musics as chime sounds, sweet MP3 music replaces monotone door chime sounds; Four Transmitters optional, operated by 23A 12V battery (included) Under MP3 player,Press the transmitter,also sound door chimes, Never miss your visitors Digital code system,long remote distance,but never interference with neighbours chimes Over 100m distance in open air(Metal frames and walls will reduce the operating distance) Suitable for home, office,travelling, enriching your daily life. Water-resistant transmitter can be mounted indoors or outdoors Built-in a LED indicator, contains seven colors alternated, when the door chime or MP3 music sounded, the LED indicator will light and change different colors Frequency:315MHz OR 433MHz Meets CE,FCC,UL,RoHS approvals Each set packed in a double side heat sealed blister packing,10 sets/innerbox;40 sets/outer carton. MP3 player/receiver dimensions:185x 45x 50 mm Bell Push Dimensions - 56 x 39 x 21mm