NineLeaf Door Sensor Chime Wireless Doors Chime Wireless Door Open Sensor 918ft Transmission Distance Anti-theft 4 Volume Levels 36 Chime Tunes Easy installation for home shop fridge office 4PK

Description Power Supply (Receiver): Micro USB or AAA alkaline battery x 3 (not included) Power Supply (Magnetic Transmitter): Micro USB or AAA alkaline battery x 1 ( included) Battery lifespan: 5-7 months (based on 30 minutes per day) Operating range: 280m/918ft Ring Volume:113dB Working frequency: 433.92MHz Magnetic Transmitter: Low battery indication Functions - Welcome the guest/customer/visitor in day time anti-thief in the night prevent the loss of dementia patients welcome /doorbell /alarm / color light etc five reminder the secret assistant of the boss! - Remote transmission 280m(918 feet) in open place suitable for more places! - 8 chord music chip 40mm big horn more pleasant more loudly! - User-Friendly 4 levels volume adjustment (Loud/High/Middle/Low ) from 113-25dB - Colorful LED lights brightness can adjust can use different colors to distinguish different entrance more intelligent! - Independent alarm horn maximum 113dB can effectively deter thieves! - Volume can adjust have memory function when change the battery more considerate and more comfortable! - Can maximum learning 32 infrared vibration magnetic etc wireless sensor accessories and 8 remote controllers. - Applicable to all kinds of shops upscale clubs hotels offices factories homes banks store garage supermarket boutique villas mail box and so on place! - MEMORY FUNCTION:Remember your last set melody and volume level after power off then don t need to reset to your previous settings again . PS: The receiver host can max learing 35 infrade curtain to detect different entrance with its color light to distinguish the entrances!