Box size: 8 pieces/11.67kg 45.5 * 41 * 36cm Single packaging weight 1.4kg 34 * 20 * 11cm Can call 1-898 numbers Minimize the number of people waiting in line as much as possible Reduce employee confusion and improve atmosphere Notify people faster Reduce employee costs improve work efficiency   Features: 1. The appearance adopts an antisymmetric design, which is simple and elegant. 2. Adopting amplitude modulation technology, the signal is stronger and more stable. 3. Touch keyboard, comfortable to use. 5. The duration of menu reminder can be set separately Specifications: Dining plate Size 106 * 51 * 11mm Shell material ABS Receiving sensitivity -114dB Standby time of about 20 hours Built in 3.7V 300mAh rechargeable lithium battery Receiving frequency 433MHz Reminder method: Beep and LED flashing The transmission distance is about 300 meters in a wide field of view Protection level IP32 Keyboard base Size 238 * 151 * 30mm Shell material ABS Transmission power 240mW Transmission frequency 433MHz Power adapter input: AC 100-240V, 50/60Hz Output: DC 12V, 1A Button mode and touch mode Modulation AM